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lsat-15-2-21
21. In response to high mortality in area hospitals, surgery was restricted to emergency procedures during a five-week period. Mortality in these hospitals was found to have fallen by nearly one-third during the period. The number of deaths rose again when elective surgery (surgery that can be postponed) was resumed. It can be concluded that, before the five-week period, the risks of elective surgery had been incurred unnecessarily often in the area.
Which one of the following, if true, most seriously undermines the conclusion above?
(A) The conditions for which elective surgery was performed would in the long run have been life-threatening, and surgery for them would have become riskier with time.
(B) The physicians planning elective surgery performed before the five-week period had fully informed the patients who would undergo it of the possible risks of the procedures.
(C) Before the suspension of elective surgery, surgical operations were performed in area hospitals at a higher rate, per thousand residents of the area, than was usual elsewhere.
(D) Elective surgery is, in general, less risky than is emergency surgery because the conditions requiring or indicating surgery are often less severe.
(E) Even if a surgical procedure is successful, the patient can die of a hospital-contracted infection with a bacterium that is resistant to antibiotic treatment.
答案为A，不太懂，只是用排除法选的
文中的结论也没太看明白（划线部分），文中是说用了 elective surgery （可以被延期的手术）以后，死亡率提高了，最后的结论却是before 五个星期阶段， elective surgery 的风险是不必要发生的，这怎么理解啊？
还有surgery was restricted to emergency procedures during a five-week period，意思是否是说手术要在5星期内完成呢？
问题较多，谢谢指点
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发表于 2003-12-27 13:19:00
