Does a drink a day keep heart attacks away? Over the past 20 years, numerous studies have found that moderate alcohol consumption, s ay, one or two beers, glasses of wine or cocktails daily helps to prevent coronary heart disease. Last week a report in the New England Journal of Medicine added strong new evidence in suport of that theory. More important, the work provided the first solid indiction of how alcohol works to protect the heart.In the study, researchers from Boston’s Brigham and Women’s Hospital and Harvard Medical School pared the drinking habits of 340 men and women who had suffered recent heart attack with those of healthy people of the same age and sex. The scientists found that people who sip one to three drinks a day are about half as likely to suffer heart attacks as nondrinkers are. The apparent source of the protection: those who drank alcohol had higher blood levels of highdensity lipoproteins, the socalled good cholesterol, which is known to prevent heart disease.
As evidence has mounted, some doctors have begun remending a daily drink for patients of heart diseases. But most physicians are not ready to reommend a regular happy hour for everyone. The risks of teetotalling(绝对戒酒) are nothing pared with the dangers of too much alcohol, including high blood pressure, strokes and liver troubles—not to mention violent behaviour and traffic accidents. Moreover, some studies suggest that even moderate drinking may increase the incidence of breast and colon cancer. Until there is evidence that the benefits of a daily dose of alcohol outweigh the risks, most people won’t be able to take a doctor’s prescription to the neighbourhood bar or liquor store.
1.The medical article quoted in the first paragraph indicates .
the way in which alcohol can help the heart
how a couple of cocktails daily can stop heart problems
why alcoholic drinks are dangerous to one’s health
that reports on the advantages of alcohol were misled
2.Experiments showed that nondrinkers had .A．larger amounts of good cholesterolB．smaller amounts of good cholesterolC．higher blood pressureD．lower blood pressure3.According to the passage, moderate drinking .
is remended by most doctors for heart patients
should be allowed on prescription
is still not medically advisable
is not related to liver problems
4.The main theme of this passage is .
the change in recent drinking habits
the connection between cancer and alcohol
whether moderate drinkers outlive nondrinkers
whether alcohol may be good for one’s health 1-4 BBCD
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(答案→)1-4 BBCD
解析：1. 第一段第一句是一个问题，第二句是对这个问题的回答。然后在第三句话中作者又引用了新英格兰医学杂志上的一篇文章来进一步支持这一理论，故B为正确答案。
2. 作者在第二段中先对实例进行对比。在本段最后一句指出，明显的保护源是饮酒者的高密脂蛋白中的含量更高，即所谓的好的胆固醇高，可抑止心脏病。由此推知不饮酒者的“好的胆固醇少”，这正是B的内容。
3. 由最后一段可知，即使是适当饮酒，也有两种不同的态度：有些医生建议心脏病患者每天喝上一点，可大多数医生并不准备这么做。此外，有的研究报告指出适当饮酒可能增加乳房和结肠癌的患病率。由此可知，C为正确答案。
4. 全文主要说明饮酒是否对健康有好处。