（讨论）新PREP1-111（以搜过以前的讨论）

glitters

Personnel officer:  The exorbitant cost of our health-insurance benefits reflects the high dollar amount of medical expenses incurred by our employees.  Employees who are out of shape, as a group, have higher doctor bills and longer hospital stays than do their colleagues who are fit.  Therefore, since we must reduce our health-insurance costs, we should offer a rigorous fitness program of jogging and weight lifting to all employees, and require employees who are out of shape to participate.  
Which of the following, if true, provides the most support for the personnel officer's proposal?
A. The medical expenses incurred by fit people who participate in a program of jogging and weight lifting are less than those incurred by fit people who do not participate in such a program.
B. More otherwise fit people are injured by participating in rigorous jogging and weight-lifting programs than are injured by participating in moderate jogging and weight-lifting programs.
C. The likelihood of incurring medical expenses is slightly greater for people who participate in fitness programs offered by their employers than it is for people who participate in programs offered commercially.
D. Moderate fitness programs increase the average person's fitness to the same extent that rigorous fitness programs do.
E. More health problems and injuries are the result of mandatory participation in a fitness program than are the result of voluntary participation.
每一个都不太明白，尤其是A，不是在说让不健康的人参加么，A说健康的人参加使医疗花销少，这有什么关系呀？请大家指教！谢谢！

glitters

明白了，谢谢！

hughlv

A. 原文中的推断有一个断层，就是没有证据证明rigorous fitness program可让employee变健康。而A刚好给出了这个证据。
B. 削弱。因为rigorous fitness program导致的是injury而不是fit
C. 无关选项
D. 削弱。既然moderate和rigorous都导致同样的效果，那就没必要用rigorous的program了，毕竟会让人更辛苦。
E. 削弱。原因同B。