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题库 / Prep2008E1-CR-112
Which of the following most logically completes the argument?
When people engage in activities that help others, their brain releases endorphins, the brain's natural opiates, which induce in people a feeling of well-being. It has been suggested that regular release of endorphins increases people's longevity, and a statistic on adults who regularly engage in volunteer work helping others shows that they live longer, on average, than adults who do not volunteer. However, that statistic would be what we would expect even if volunteering does not boost longevity, because __________.
in the communities studied, women were much more likely to do regular volunteer work than men were, and women tend to live longer than men do
the number of young adults who do regular volunteer work is on the increase
the feelings of well-being induced by endorphins can, at least for a time, mask the symptoms of various conditions and diseases, provided the symptoms are mild
it is rare for a person to keep up a regular schedule of volunteer work throughout his or her life
some people find that keeping a commitment to do regular volunteer work becomes a source of stress in their lives
情景：当人们帮助别人时，大脑会释放出一种让人感觉很爽的物质。凡是经常性参加志愿工作的人都会比不参加的人更加长寿。但是，就算是志愿工作不能导致人们长寿，这个数据也依然会是这样。
答案预估：
直接解释为何“就算是志愿工作不能导致人们长寿，这个数据也依然会是这样”的即可。
选项分析：
A选项：Correct. 在被研究的社区，女性相较于男性更有可能做经常性的志愿工作，而女性的平均寿命要长于男性。本选项解释了为什么参加志愿工作的人长寿，即，因为女性本来活的时间就长。也就是说，即便志愿活动和长寿无关，数据也依旧如此。
B选项：做经常性的志愿者工作的年轻人人数正在增加。年轻人并不代表活的时间长。
C选项：如果症状比较轻微的话，那么多巴胺所带来的良好的感觉，至少一次，可以掩盖住很多情况和疾病的症状。本选项没有提到“长寿”的问题，可以排除。
D选项：对于一个人来说，很难在他的一生中一直做经常性的志愿工作。本选项没有提到“长寿”的问题，可以排除。
E选项：有些人发现，做经常性的志愿工作会变成一种压力的来源。没有理由相信压力会导致短寿。
that statistic would be what we would expect even if volunteering does not boost longevity就算是志愿工作不能导致人们长寿，这个数据也依然会是这样。
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