2. 外语
  3. You’ve probably heard the reports that moderate drinking can actually be good for your heart. But before you stock up(囤积)on beer

You’ve probably heard the reports that moderate drinking can actually be good for your heart. But before you stock up(囤积)on beer

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问题     You’ve probably heard the reports that moderate drinking can actually be good for your heart. But before you stock up(囤积)on beer, wine, or liquor for "medicinal purposes", read the fine print.
    Guidelines published by the Department of Health and Human Services define moderate drinking as no more than a drink a day for most women and no more than two drinks a day for most men. But even moderate drinking may be ill-advised as you get older.
    Research shows that as you age, you absorb alcohol more readily and are more sensitive to its effects. So the number of drinks you could tolerate years ago may be too much for you now. Why? First, your body’s ratio of water to fat falls as you age, so there’s less water to dilute(稀释)the alcohol. Second, you have less blood flow to the liver and less efficient liver enzyme action, so your body doesn’t metabolize(新陈代谢)alcohol as readily.
    Women need to be especially careful, since most can’t tolerate as much alcohol as men can. One reason is that they are generally smaller, and smaller people have less blood volume, so a little alcohol goes a longer way. Women also produce less of the enzyme that breaks down alcohol in the stomach before it is absorbed into the bloodstream. And they have a higher proportion of body fat, which does not absorb alcohol. The result? Drink for drink, women have 75% more alcohol in their bloodstream than men do.
    Despite the caveats(警告, 告诫), there’s no doubt that, for many people, limited amounts of alcohol can help you live longer and decrease your risk of heart disease. Those who may be at risk for heart disease or stroke and those who are diabetic appear to benefit most from moderate alcohol intake(one or two drinks per day)over the course of their lifetimes.
    For example, in a University of Wisconsin study of diabetic men and women with an average age of 69, the risk of death from coronary heart disease was significantly lower among moderate drinkers compared to abstainers(戒酒者). The death rate for those who had a drink a day was less than half of that for those who didn’t drink at all.
As you get older, ______.
选项 A、you can tolerate more alcohol
B、you have less water in your body
C、your body metabolize alcohol more readily
D、your body becomes more sensitive to alcoholic effects
答案D
解析 细节题。根据第三段，随着年龄增长，几年前你能忍受的酒量现在可能成为过量。因为年龄越大，人体内水与脂肪的比率下降，用于稀释酒精的水就变少，所以人体对酒精吸收越快，对酒精就越敏感。而且随着年龄增大，流到肝脏的血液减少，肝脏酶的作用减弱，因此新陈代谢就不像以前那样快了。由此可知，只有D符合原文意思，故是正确答案。
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