og 蓝本 逻辑 45

一只追梦的猫

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 frature.When a number of follow-up x-rays were reviewed ,however,all the fracturethat had intitally been judged stable were found to have healed correctly.Therefore,it is a waste of money to order follow-up x-rays of ankle fractures intially judged stable.

Which of the following, if ture,most strengthens the argument?
A.doctors who arre general practitioners rather than orthopedists are less likely than orthopedists to judge the stability of an ankle fracture correctly.

B.many ankle injuries for which an initial x-ray is ordered are revealed by the x-rays not to involve any fracture of the ankle.

c.x-rays of patients of many different orthopedists working in several hospital were reviewed.

D.the healing of ankle fractures that have been surgically reparied is always checked by means of a follow-up x-ray.

E.orthopedists routinely order follow-up x-ray for fracture of bones other than ankle bones.
答案是：C
求大家帮忙说下解题思路哈，答案没看懂。

夏沐清风

ADE都很容易排除。
看B和C
我这题做错是因为没有读懂题意。题目问的是支持结论，即不需要做follow-up x-rays.
B里面说的是:initial x-ray没有检查出有fraction，并不能说明不需要做follow-up x-rays.相反，就是因为initial没有检查出来，也许就更需要后续的检查。是削弱。
而C说x-ray已经被不同的blabla review过了，说明不需要再review了。加强。