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题库 / OG2017V-CR-160
Often patients with ankle fractures that are stable, and thus do not require surgery, are given follow-up x-rays because their orthopedists are concerned about possibly having misjudged the stability of the fracture. When a number of follow-up x-rays were reviewed, however, all the fractures that had initially been judged stable were found to have healed correctly. Therefore, it is a waste of money to order follow-up x-rays of ankle fracture initially judged stable.
Which of the following, if true, most strengthens the argument?
Doctors who are general practitioners rather than orthopedists are less likely than orthopedists to judge the stability of an ankle fracture correctly.
Many ankle injuries for which an initial x-ray is ordered are revealed by the x-ray not to involve any fracture of the ankle.
X-rays of patients of many different orthopedists working in several hospitals were reviewed.
The healing of ankle fractures that have been surgically repaired is always checked by means of a follow-up x-ray.
Orthopedists routinely order follow-up x-rays for fractures of bone other than ankle bones.
这道题说的是，实践中发现fractures that had initially been judged stable were found to have healed correctly，所以follow-up x-rays 是没用的。但此处的疑问就是，真的是所有的fractures that had initially been judged stable 都长好了、再没出现过异常情况吗？
C答案直译就是“在不同医院工作的医生的病人都X光都被review过了”正是在fix题干中的这个weakness，意思是说，“fractures that had initially been judged stable were found to have healed correctly”是在总结了许多医院的不同的医生的病例后下的结论，从统计意义上讲是有代表性的，所以确实是没有必要再开X光的。
这道题思路可以是，先判断出削弱：也可能有一些没有判断正确的，那么加强就是：更加说明判断的都正确，只有C表达这个意思
枚举推理
大多数后来的x光都证明了没问题，结论病人都没什么问题，所以后来的x光没必要检查 答案需要提及样本
A 没提到样本
B 许多受伤通过首次x光都发现没有任何破坏 提到的是第一次x光，结论是follow up x光
C 样本代表性，说明确实没必要检查
D 无提及样本
E 无关
X-rays 被不同的医生都看过了，降低了误判率
C: x-ray 显示 没问题，就不用后续的 Follow-up 了。 这是加强！句意看混淆了！
E选项：医生惯例为其他骨折开跟踪，而不是为踝骨折。 这难道不是加强了 为踝骨折开跟踪是浪费钱吗？
医生为其它的骨折开跟踪x-ray，这并不代表他们做的就是对的，当然也不代表他们就没浪费钱。反过来说，自然为踝关节开follow-up也不一定是浪费钱。
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