求教 GWD-9-Q16

xingmic15

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.  
             没解释convergence

C.    Reports of the health benefits of red wine have led many people in the United States to drink red wine regularly.
             没解释convergence
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.



此题BDE都没有问题，各位能帮忙解释下A和D两个选项吗？ A和D两项 感觉 有点怪，我没有选，可是具体是哪里错了呢？

xingmic15

自己先顶一下~~

xingmic15

再顶一个~  大家帮忙解答一下吧~~

ying178

供参考：
事实：摄入饱和脂肪增加心脏病风险，喝红酒降低心脏病风险。法国人与美国人摄入饱和脂肪量一样，但由于更爱定期喝红酒，所以法国人心脏病少。
矛盾：法国人与美国人喝酒差异不大了，发病率却未见趋同。
A 摄入饱和脂肪更多与动脉壁的脂肪堆积相关，减少血液流向心脏，而非与心脏病直接相关（机理问题，客观存在，既没说明喝红酒的差异不大了，也和发病率是不是会趋同无关，更解释不了矛盾现象）
D 抽烟也导致心脏病，法国仅比美国略高。（言外之意是抽烟的影响很小，slightly，可排除抽烟的影响，因此也解释不了矛盾现象）