• 所属考试大学英语六级试题库
  • 试题题型【阅读理解 Section B】
A. Several months ago, the U.S. Centers for Disease Control and Prevention released astunning report on the impact of resistant bacteria. According to the analysis, whichCDC officials said was conservative, more than 2 million people are infected in theUnited States each year by bacteria that are resistant to a wide array of the safest andmost effective antibiotics. Of those, at least 23,000 die. The illnesses and deaths costsociety some $55 billion annually--S20 billion from additional health-care spendingand $35 billion from lost productivity. "If we are not careful, we will soon be in apost-antibiotic era," said Dr. Tom Frieden, the director of the CDC. "And for somepatients and for some microbes, we are already there."
B. Resistant bacteria spread not only with cross-contamination from people who arealready sick or unknowingly carrying the microbes; they also come from foodAmericans eat. Indeed, a current multistate outbreak of a multi-drug-resistant straincalled Salmonella Heidelberg (海德堡沙门氏菌) was traced to Foster Farms brandchicken. At present, the microbe had infected more than 300 people in 20 states andPuerto Rico; more than one third of them required hospitalization.
C. In the past, drug-resistant bacteria were relatively easy to confront, with pharma-ceutical ( 制药品 ) companies pumping out ever-more sophisticated antibiotics. BigPharma isn't investing much time or effort in these lines of treatment these days--why commit hundreds of millions of dollars to research and develop a new antibioticthat will only be taken by a patient for a few days, when a breakthrough drug for, say,diabetes could be both unique and used by people for a lifetime?
D. "We have an increasing antimicrobial resistance across the world and we have adecreasing pipeline of new antibiotics," said Dr. Ed Septimus, a professor of internalmedicine at Texas A&M Health Science Center and Medical Director for the InfectionPrevention and Epidemiology Clinical Services Group at HCA Healthcare System. "Itis a perfect storm in which, for some patients, it will feel like we are going back to the pre-antibiotic era." What would it be like living in a world without antibiotics? You can say goodbye to many lifesaving procedures we now consider commonplace.
E. Take heart transplants--they can be performed only because surgeons are confident the antibiotics they give patients before the procedure will prevent a postoperative infection. The same holds true for other complex surgeries. Chemotherapy (化疗) severely inhibits the immune system, which is why chemo patients require antibiotics. "So many of these medical miracles that we take for granted are only possible because we have been able to deal with infectious complications," said Ruth Lynfield, the state epidemiologist ( 流行病专家 ) and medical director at the Minnesota Department of Health. "If we can't do that, those areas of medicine--surgery, transplants, intensive care, neonatal (新生儿 ) care——could be lost."
F. And it could be even worse. Several medical experts noted that while a virus causedthe influenza pandemic of 1918, most of the tens of millions of people who perished from the disease died of a bacterial infection in the lungs. With effective antibiotics, that complication can be treated. Given the scarcity of viral vaccines in much of the world, if a resistant bacteria takes hold, all anyone could do is find an effective way to dispose of the bodies. Given the stakes, it is astonishing to realize the causes of this threat are well-understood and the ways to attack it well-known. Even as far back as 1945, Alexander Fleming, a pioneer in antibiotics, said, "the misuse of penicillin( 青霉素 ) could be the propagation of mutant ( 突变) forms of bacteria that would resist the new miracle drug."
G. In essence, this crisis is looming because the world consumes too many antibiotics. In the United States, doctors prescribe them too often, many times because patients demand them for illnesses that are not bacterial and thus cannot be treated with antibiotics, such as colds and other sicknesses caused by viruses. The CDC found that the greatest use of antibiotics for humans occurs in the Southern states, a fact that medical experts struggle to explain. One thing the data and studies indicate, though, is that the areas with the highest use are most likely to experience the most resistant bacteria.
H. But the amount of antibiotics used humans for medical purposes pales in comparison to the quantities fed to American livestock--pigs, cattle, and the like. According to the Food and Drug Administration, about 80 percent of all antibiotics sold in 2011 were used on animals, primarily for spurting growth.
I. What makes the use of antibiotics for growth in meat and poultry ( 家禽 ) productionparticularly troublesome, experts say, is the low dosages. Using small amounts of antibiotics is more likely to create resistant bugs, the experts said, because the microbes are not wiped out. Instead, the bacteria are essentially trained to resist thedrugs. "It creates a reservoir of drug-resistant genes," said Dr. Henry Chambers, aprofessor of medicine at University of California San Francisco.
J. Antibiotics are also used for animals in the United States as aprophylactic ( 预防药品 ),to prevent infections likely to spread because of the meat and poultry productionprocess. These so-called "production diseases" are the result of a system which placesever larger numbers of animals into ever smaller containment areas, exposing them toeach other's feces, urine and--as a result--bacteria. "We need to change the animalproduction system, where animals are healthier and infections become the exceptionand not the norm," said Dr. Lance Price, a professor at the George WashingtonUniversity School of Public Health and Health Services who specializes in studyingresistant bacteria. "We should prevent infections in animals by not overcrowdingthem, not packing them in together and not exposing them to easy contamination."
K. The connection between antibiotic usage in animals and the development of resistantbacteria has long been recognized in Europe, which banned the use of the drugs asgrowth promoters in 2006. In the United States, the FDA only imposed voluntaryrestrictions in 2012, which, experts said, seems to have done little to decrease usageof antibiotics for livestock. "When you compare our use of antibiotics for animals towhat they're seeing in Europe," said Lynfield, "we are not doing well."
L. Despite the magnitude of the risk, many basic strategies for containing and identifyingthreats have not been adopted. For example, there is no comprehensive international surveillance of threats from antibiotic resistance; identification only occurs with the appearance of an outbreak rather than through examination of strains. According to the CDC, there is no systematic collection of detailed information about the use of antibiotics either in human health care or in agriculture in the United States. Without the ability to track, isolate and identify these pathogens (病原体 ) , the both state and government health officials are unable to act until people start showing serious signs of illness or dying.
M. Medical experts agree that the use of antibiotics to spur growth in animals or to prevent disease caused by processing techniques has to stop. They also say that up to half of the usage of antibiotics by humans is unnecessary. Programs to engage in what is known as "antibiotic stewardship"--training physicians on the proper uses of the drugs and even limiting the ability of doctors in hospitals who are untrained in infectious diseases to prescribe antibiotics--have begun to be implemented, although they are not yet widespread. Since large pharmaceutical companies have little economic incentive to develop antibiotics, the experts say, government has to step up, funding basic research into new treatments that would cut the cost for the development and sale of new drugs.
N. The hardest step could be restraining the international use of antibiotics. Many resistant strains are emerging in India and Southeast Asia, where antibiotics can be purchased without a prescription, according to Dr. Trevor Van Schooneveld, medical director of the Antimicrobial Stewardship Program at the University of
Nebraska Medical Center. The resistant strains that emerge in those locations easilyspread around the world; for instance, a resistant bacterium that causes urinary tractinfections emerged not long ago in New Delhi; it is now being found in the UnitedStates.
O. The failure to pursue these solutions have left infectious-disease specialists frustratedas they see the world moving further and further away from the promise offered somany decades ago by antibiotics. Governments, they fear, may not act forcefully untilthe problem becomes overwhelming. "We may have to wait until the deaths of somereally prominent and previously healthy people," said Relman. "It might be that onlyby shocking the public will we be able to have the world take this threat seriously."
1.[选词填空]Compared with antibiotics used on human beings, the use on farm animals in Americais much more.
    • 解题思路:题干意为,与人使用的抗生素相比,美国用在农场动物身上的抗生素要多得多。根据题干中的关键词human beings和farm animals可定位到H段。该段首句提到,但与美国牲畜——猪、牛等使用的抗生素数量相比,被人类用于医疗目的的数量就相形见绌了。由此可知,题干是对原文的同义转述,故选H。
    2.[选词填空]Compared with the past, drug-resistant bacteria are harder to deal with now.
      • 解题思路:题干意为,和过去相比,抗药性细菌现在更难对付。根据题干中的关键词the past和harder可以定位到C段。该段首句提到,在过去,由于制药公司不断生产更多更复杂的抗生素,抗药性细菌相对容易对抗。意即对抗抗药性细菌,现在比以往更难了。由此可知,题干是对原文的同义转述,故选C。
      3.[选词填空]Production diseases arise when too many animals are confined in small living space.
        • 解题思路:题干意为,太多动物被关在狭小空间生活时就会产生生产性疾病。根据题干中的关键词Production diseases可定位到J段。该段第二句提到,这些所谓的“生产性疾病”是一种将越来越多的动物关在越来越狭小的空间的系统所产生的结果……由此可知,题干是对原文的同义转述,故选J
        4.[选词填空]Antimicrobial resistance develops fast around the whole world; meanwhile, we haveless new antibiotics to produce.
          • 解题思路:题干意为,抗生素耐药性在全世界发展迅速,与此同时,我们生产的新型抗生素却越来越少。根据题干中的关键词Antimicrobial resistance可定位到D段。该段首句提到,抗菌素的耐药性在世界各地都在增强,而我们制造新型抗生素的能力在下降。由此可知,题干是对原文的同义转述,故选D。
          5.[选词填空]Antibiotics' ability to fight against infectious complications makes it possible to carryout complicated surgeries.
            • 解题思路:题干意为,抗生素能够抵御感染并发症,使得复杂手术的进行成为可能。根据题干中的关键词infectious complications和complicated surgeries可定位到E段。该段第四句提到,很多我们认为理所当然的医学奇迹都是因为我们能够处理感染性并发症才成为了可能。由此可知,题干是对原文的同义转述,故选E。
            6.[选词填空]In America, antibiotics are used excessively not because patients really need them butbecause they think they should have them.
              • 解题思路:题干意为,在美国,抗生素被过度使用,不是因为病人真的需要,而是因为他们认为自己应该使用。根据题干中的关键词patients可定位到G段。该段第二句提到,在美国,医生开抗生素太过频繁了。很多时候是因为病人要求用其来治病,而他们的病却不是由细菌感染的,因而不能用抗生素来治疗,比如由病毒引起的感冒和其他疾病。由此可知,题干是对原文的同义转述,故选G。
              7.[选词填空]Infectious-disease specialists worry that the way to avoid the destructive consequenceof antibiotics has not been found yet.
                • 解题思路:题干意为,传染病专家担忧的是目前还未找到避免抗生素带来毁灭性后果的方法。根据题干中的关键词infectious.disease specialists可定位到0段。该段首旬提到,所有这些解决方案的失败,使得传染病专家深感挫败,因为他们看到世界正在一步步地离几十年前抗生素“描绘”的前景越来越远。由此可知,题干是对原文的同义转述,故选O
                8.[选词填空]Alexander Fleming has already predicted the dangerous consequence of misuse ofantibiotics at the time he invented penicillin.
                  • 解题思路:题干意为,弗莱明在发明青霉素时就已经预测到滥用抗生素会导致的危险后果了。根据题干中的关键词Alexander Fleming可定位到F段。该段末句提到,抗生素先驱亚历山大·弗莱明说过:“青霉素的滥用可能会造成细菌突变传播,进而对这种神奇的新药物产生耐抗作用。”由此可知,题干是对原文的同义转述,故选F。
                  9.[选词填空]As early as 2006, Europe has realized the danger of using antibiotics on animals tostimulate the production.
                    • 解题思路:题干意为,早在2006年欧洲就已经认识到使用抗生素增加动物产量的危险了。根据题干中的关键词2006和Europe可定位到K段。该段首句提到,欧洲人很早就认识到了动物使用抗生素和细菌耐药性的发展之间的联系,于2006年开始禁止使用药物作为生长促进剂。由此可知,题干是对原文的同义转述,故选K。
                    10.[选词填空]In the program of "antibiotic stewardship", doctors are deprived of the right toprescribe antibiotics if they haven't received training in infectious diseases.
                      • 解题思路:题干意为,在“抗生素管理”的项目中,未受过感染疾病训练的医生会被剥夺开抗生素的权利。根据题干中的关键词antibiotic stewardship可定位到M段。该段第三句指出,诸如“抗生素管理”的项目虽未大面积展开,但已经开始贯彻实施。该项目旨在培养医生正确使用药物,甚至限制医院中未受过传染病训练的医生开抗生素的处方权。由此可知,题干是对原文的同义转述,故选M。
                      • 参考答案:H,C,J,D,E,G,O,F,K,M