※ 引述《fishma ( )》之铭言： : 53. : There is a great deal of geographical variation in the frequency of : many surgical procedures-up to tenfold varition per hundred thousand people : among different areas in the numbers of hysterectomies, prostatectomies, and : tonsillectomies. : To support a conclusion that much of the varition is due to unnecessary : surgical procedures, it would be most important to establish which of the : following? (B) The varition is unrelated to factors (other than the surgical procedures themselves) that influence the incidence of diseases for which surgery might be considered. : 请问一下原题的意思是?? : 答案B，为什麽跟这些考虑要动手术的因素无关呢??? : OV详解看不太懂 麻烦大家了 谢谢!! 如果有某些因素(factors), 确实会影响(influcnce)这些疾病的 发生机率(the incidence of deseases), 那就不能说这些手术是unnecessary. (譬如说地区居民年纪较大或是当地环境的影响之类...) 反正若能证实(establish)手术频率的差异与这些因素无关(unrelated), 就可以支持 "差异是由於许多不必要的手术所导致" 这样的结论. --

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