24-22 Often patients with ankle fractures that are stable, and thus do not require surgery, are given follow-up x-ray 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?
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.
ans: B
我选C。 原文是说ankle 骨折的病人骨折病情是稳定的,所以不需要手术。而B是说的是另一回事,B是说没有骨折的ankle受伤者,应是无关选项。
而C是加强了原文的前提,即:follow-up的X-rays 被reviewed的范围更大。结合原文:all the fractures that had initially been judged stable were found to have healed correctly, 应是一很好的加强!
请NNS指点!
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