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  3. Those who micromanage their diets instead of following Michael Pollan’s sensible rule of thumb—eat food, not too much, mostly pl

Those who micromanage their diets instead of following Michael Pollan’s sensible rule of thumb—eat food, not too much, mostly pl

admin2016-03-21  29
问题     Those who micromanage their diets instead of following Michael Pollan’s sensible rule of thumb—eat food, not too much, mostly plants—may be thrown into confusion by a paper just published. It describes a meta-analysis of 72 pieces of research involving more than 600,000 people.
    Some of these were of what those people ate, or said they ate. Some were of the levels of various fats circulating in their bloodstreams. Some were of both. All had looked for relations between these facts and a person’s subsequent cardiac health. And the meta-analysis comes to what will, to many, be counterintuitive conclusions.
    Rajiv Chowdhury of Cambridge University and his colleagues found that one puzzle, trans-fats , are indeed associated with heart disease—though they caution that only five of the studies they looked at had relative data on these. Other common beliefs, however, were not supported.
    They found no evidence that eating saturated fats or having high levels of circulating saturated fatty acids had any effect on cardiac disease. Nor did they find that omega-3 fatty acid, the current poster-boys of healthy eating, protect against heart disease.
    Omega-3 fats are widely sold in capsule form as food supplements. This makes them easier than other fats to incorporate into experiments that administer something to one group while denying it to another. Dr. Chowdhury’s meta-analysis was based on such experiments. Indeed two big, new trials of omega-3 supplements are going on at the moment. But such trials are hard to do on other sorts of fat, since these are simply part of people’s diets. Many people do not mind being asked either to pop a capsule regularly, or to refrain from doing so. It is understandably harder to persuade them to let someone else decide their entire food consumption for the several years needed to conduct trials like these.
    This sort of unwillingness is, indeed, one reason heart disease is a problem. Most people do not have the willpower to stick to a diet, any diet, prescribed by someone else—even the simple one offered by Mr. Pollan, who is the author of "Food Rules: An Eater’s Manual". But eating a reasonably mixed ingredient diet, along with moderate exercise, still seems the best route to a long and healthy life. Dr. Chowdhury and his colleagues are not suggesting that the amount of fat you eat has no bearing on your risk of having a heart attack. What their research does suggest is that, trans-fats aside, the type of fat may not matter.
According to the final paragraph, if you want to have a long life, you need to ______.
选项 A、eat less and exercise more
B、take exercise as often as you can
C、keep away from liquor and cigarettes
D、keep a balanced diet and do some exercise
答案D
解析 根据题干定位到最后一段。根据题干定位到But一句，答案就来自eating a reasona—bly mixed ingredient diet，along with moderate exercise一句。选项[A]的eat less and exercisemore不能和原文完全相符，原文说的是reasonably mixed ingredient diet“强调合理饮食”，而不是eat less“少吃”，而exercise more和原文的moderate exercise“适度锻炼”也不完全相符，该项错误。选项[B]仅仅提到锻炼，过于片面，也是错误的。选项[C]原文没有提到，属于无中生有，故可以排除。选项[D]的keep a balanced diet and do some exercise“平衡饮食并做一些锻炼”与原文的“合理饮食，适度锻炼”基本吻合，故[D]为最佳答案。
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