男性，32岁，因车祸致右股骨中段斜形骨折，经切开复位钢板螺丝钉内固定1年，愈合后于5天前手术取出内固定，半小时前下地行走时不慎跌倒，感右大腿剧痛不能活动，摄片显示原骨折处出现裂缝，断端向外成角。
首选的治疗措施是
A．手法复位纠正成角后用髋“人”字形石膏固定
B．切开复位钢板螺丝钉内固定
C．切开复位，髓内针内固定
D．股骨髁上骨牵引
E．手法复位小夹板外固定
参考答案：B
解析：骨折内固定术后再次骨折首选切开复位内固定。
Professor Green, known to the world as a scientist, is not only  absent-minded but short-sighted as well. His mind is always busy 41 scientific problems and seldom notices what is going on 42 him.One fine day recently, he went 43 a walk in the countryside, but as 44 he has a book in his hand. When he went out , he began to read his book . He hadn’t gone far 45 he run into a big cow and fell down. In the fall, he had lost his glasses, without which he couldn’t see anything. He thought he had hit his head 46 a fat lady. “I’m sorry, Madam.” He said politely 47 searching for his glasses. As soon as he had 48 , he realized his mistake. Soon he was fixing his mind on his book 49 and paid no attention to anything else. He had scarcely been walking for five minutes when he fell over again, _50 both his book and his glasses. This time he got very angry, seizing his umbrella, he gave the “cow” a wild blow. Then, after finding his glasses, he realized with horror that he made a second mistake. A large fat woman was  fleeing from him in a horror.
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