女性，30岁，癫痫大发作半年，每月4～5次。既往：10年前（14岁时）左侧头部外伤史，当时左额顶部凹陷性骨折，下凹0.8cm，当时无阳性体征，未行手术。此次入院CT示左额顶区有一高密度影，直径0.6cm大小，其周围有低密度区，无占位效应。
CT示左额顶区有一直径0.6cm大小高密度阴影，最可能的是（）
A.出血
B.梗死
C.肿瘤
D.增生的颅骨
E.骨折的碎片
参考答案：E
If you are lost in the mountain, don’t get nervous. Staying calm will greatly your chances of survival. Many people think that good preparation is very . But actually the most important thing is to keep calm. In order to survive, you can do the following things. First, find a hiding place. Unnecessary movement will make you . You’d better find a hiding place to rest in order to save your . If you are in snow, you may be able to dig a cave for protection the cold weather. Second, send a signal(信号) to searchers for help. The best time to a signal for help is during the day. Do this from the point. It will be easier for searchers to see you. If you take a box of matches, build three smoky fires with some dry branches and the will tell other people where you are. Third, do not walk away. Walking away will make it more difficult to find you, searchers will try to follow your path and may you if you have gone off in a different direction. Searchers often find a car with no one in it.
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