一道难题

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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 argume?

A)        Doctors who are 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-ray not to involve any fracture of the ankle.
C)        X-rays of patients of many different orthopedists working in several hospitals were reviewed.
D)        The healing of ankle fractures that have been surgically repaired is always checked by means of a follow-up x-ray.
E)        Orthopedists routinely order follow-up x-rays for fractures of bone other than ankle bones

答案是 C

这道题的答案是什么意思，我怎么没读懂呀？ 谁能帮帮忙。 非常谢谢， 感激不尽。

turbidtear

这题逻辑是：如果ankle stable，就要X-ray 复查，确保stable是诊断无误。但经过X-ray复查后，发现之前的诊断都是正确的。所以用X-ray复查就是浪费。

C选项，X-ray经过很多医生review，这增强了X-ray复查的准确性，也就增强了argument的结论。

alzn2765

C的意思就是那些判断为无需复诊的X光片都是很多有经验的医生认真看过X光之后得出的结论，不是误判的。等于是加强了前提的正确性，也就加强了X光复诊的确没必要这个结论。