There is a great deal of geographical variation in the frequency of many surgical procedures—up to tenfold variation per hundred thousand between different areas in the numbers of hysterectomies, prostatectomies, and tonsillectomies.
To support a conclusion that much of the variation is due to unnecessary surgical procedures, it would be most important to establish which of the following?
(A) A local board of review at each hospital examines the records of every operation to determine whether the surgical procedure was necessary.
(B) The variation is unrelated to factors (other than the surgical procedures themselves) that influence the incidence of diseases for which surgery might be considered.
(C) There are several categories of surgical procedure (other than hysterectomies, prostatectomies, and tonsillectomies) that are often performed unnecessarily.
(D) For certain surgical procedures, it is difficult to determine after the operation whether the procedures were necessary or whether alternative treatment would have succeeded.（B）
(E) With respect to how often they are performed unnecessarily, hysterectomies, prostatectomies, and tonsillectomies are representative of surgical procedures in general.
答案是B, 不知怎麽想, 我决得E挺对呀?要想得出一个general 的结论需要前面说的实例(hysterectomies, prostatectomies, and tonsillectomies )具有代表性呀...想不明白B在说什麽? 大家指点指点, 多谢作者: hdrtrw112 时间: 2004-7-12 17:07
B说的是：不会由于是地区的原因而导致所发的病有所不同举个例子，饭店里吃番茄炒蛋要15块，家里只要3块的成本，那结论是饭店很黑To support a conclusion that much of 饭店 is due to unnecessary surgical procedures, it would be most important to establish which of the following这种价钱的变化没有影响到这盘菜的口味。反而言之，如果饭店的菜味道好，那当然要价钱贵咯。至于E有一个归纳总结的问题，因为后面的那几种病是作为一个举例出现的，而原文的结论又没有涉及到这几种具体的病，所以，这个选项是无法对原文做出支持的
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