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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  47
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.
Rajiv Chowdhury and his colleagues find that______.
选项 A、trans-fats are actually irrelevant to heart disease
B、most of their studies and theories have been supported
C、few data can prove the relation between fats and heart disease
D、omega-3 fatty acid is proved the defender against heart disease
答案C
解析 根据题干中的人名定位到第三段，再根据find一词锁定范围在第三、四两段。选项[A]对应第三段第一、二行：trans-fats，are indeed associated with heart disease．其中associated with“有联系”被换成了irrelevant to“不相干”，故该项错误。选项[B]对应第三段最后一句：Other common beliefs，however，were not supported．显然该项与原文相反，故错误。选项[C]对应第三段第一、二行：trans-fats，are indeed associated with heart disease--though theycaution that only five of the studies they looked at had relative data on these．其中only five…had relative data=few data can prove，故该项正确。选项[D]对应第四段最后一句：Nor didthey find that omega一3 fatty acid，the current poster—boys of healthy eating，protect against heartdisease．原文的nor did they find(evidence)“他们也没找到证据”与该项的is proved“被证明”不符。综上，答案为[C]。
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