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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  48
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.
Generally speaking, people are unwilling to______.
选项 A、let others decide their diet for a long time
B、be required to take capsule every day
C、be involved in an experiment
D、listen to expert’s advice
答案A
解析 根据unwilling一词定位到最后一段this sort of unwillingness，而this指代上文内容，故该题答案来源于第五段。第五段最后两句指出：Many people…It is understandably harderto persuade them to let someone else decide their entire food consumption for the several yearsneeded to conduct trials like these．其中，It is understandably harder to persuade them=peopleare unwilling to；let someone else decide their entire food consumption for several years=选项[A]let others decide their diet for a long time，其余几项均不在答案句出现，或原文没有对应信息，故该题答案为[A]。
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