GWD-9-16

请教一到CR：

答案是E

没大看懂，请指教，多谢！

贴图看的不是太清楚，我把题重新贴一下：

Q16:
A diet high in saturated fats increases a person’s risk of developing heart disease.
Regular consumption of red wine reduces that risk. Per-capita consumption of saturated
fats is currently about the same in France as in the United States, but there is less heart
disease there than in the United States because consumption of red wine is higher in
France. The difference in regular red-wine consumption has been narrowing, but no
similar convergence in heart-disease rates has occurred.
Which of the following, if true, most helps to account for the lack of convergence noted
above?
A. Consumption of saturated fats is related more strongly to the growth of fatty
deposits on artery walls, which reduce blood flow to the heart, than it is to heart
disease directly.
B. Over the past 30 years, per-capita consumption of saturated fats has remained
essentially unchanged in the United States but has increased somewhat in France.
C. Reports of the health benefits of red wine have led many people in the United
States to drink red wine regularly.
D. Cigarette smoking, which can also contribute to heart disease, is only slightly
more common in France than in the United States.
E. Regular consumption of red wine is declining dramatically among young adults in
France, and heart disease typically does not manifest itself until middle age.

题目的意思是：经常喝红酒有助于减少患心脏病的危险。在法国心脏病的发病比美国少，因为他们的红酒消费量高。但现在两个国家的（人均）红酒消费量的差异已经比较小了，但心脏病发生率方面的差异却没有同样减少，问原因：

E说：在法国，在年轻人当中，经常喝红酒的人急剧减少，但心脏病通常在人到中年才显现出来。

这就说明，美国和法国红酒（人均）消费量差异的减小，可能并不是因为美国人比以前喝更多的红酒了，而是因为法国的年轻人比以前喝的少了。这样就造成美国的心脏病发病率没有减少，而由于心脏病通常在中年才显现，所以法国的心脏病发病率在短期内也没有增加，这样，两个国家之间心脏病发病率的差距并没有减少。

请NN解释下为什么B不对啊.我做题的时候答案都没看完，直接就把B选出来了

不是说过去三十年消耗量在法国是增加的，所以即使红酒喝的和美国人一样多了，两个国家之间心脏病发病率的差距并没有减少。

对 lawer_1 的解释还是不明白。俺认为 B 挺对的。

由于 对 heart disease rate (HDR)， 法国的 >  美国的，

所以  difference = 法国的HDR - 美国的HDR > 0

法国的per-capita consumption of saturated fats 增加，则法国的HDR 会增加，

difference 便会变大。正好可以解释原文的 no similar convergence in heart disease.

但是，B 中可能有问题的是 "increased somewhat in France",

somewhat 的含义很弱，常被 Ｋａｐｌａｎ　认为不是正确答案的标志。

ＮＮ　再看看吧。

原文给两个规律：FAT高HEART DISEASE也高。WINE低HEART DISEASE也低。

过去：法国（FAT一样，WINE高，HEART DISEASE低）

           美国（FAT一样，WINE低，HEART DISEASE高）

现在：WINE的差别已缩小，却HEART DISEASE没缩小。

B说美国的FAT没变，法国的FAT增加点，既然法国的FAT增加，HEART DISEASE也应增加，它和美国在HEART DISEASE方面的差距应缩小。但原文要你解释的是没缩小。

看错了，原来是法国低,做题的时候看成M国低了,review的时候居然还是看成M国低

谢谢斑竹的解释..

搞清楚俺那里错了。

上次说的" difference = 法国的HDR - 美国的HDR > 0“ 不对，应该是

difference = 美国的HDR - 法国的HDR > 0

这样就可以解释了。在谢 lawyer_1 !