问题 单项选择题

男性,35岁。上班途中被树枝砸伤头顶,局部头皮破裂,出血不止。在医院急诊室检查:左顶皮肤不规则裂伤 5cm,未哆开,生理盐水冲洗时,引起大量出血。清创后全层缝合,血止。其出血不止原因最可能是

A.头皮大动脉损伤,缝合时正好将其结扎
B.头皮裂口内存有异物
C.病人的凝血机制障碍
D.帽状腱膜没有受伤
E.帽状腱膜受伤裂开

答案

参考答案:D

解析:本例头皮裂伤患者,伤后出血不止,伤口未哆开,清创全层缝合后才血止。头皮是由5层构成,即皮肤、皮下组织、帽状腱膜、帽状腱膜下组织及骨膜。前三层有纵行纤维相连,形同一层,帽状腱膜下组织则疏松。该患者头皮裂伤,伤口未哆开,说明损伤仅达皮下组织,帽状腱膜未损伤,皮下组织中血管不能自行收缩止血。清创后全层缝合才压迫血止。因此正确答案是D。

完形填空
Nowadays we call see more and more electric bikes hi the street. Electric bikes are easy to  41  and they can run faster than ordinary bikes. So they become very  42  in many cities in China now.
But the electric bikes also  43 many traffic accidents happen. So the Chinese government plans to make a new   44  for the electric bike riders(骑车者). If  45   electric bike is heavier than  40 kilos and it can go   46  than 20 kilometers an hour, its rider must get a license (执照). It means riders have to pass driving test  47 __ they ride their electric bikes on the road.
People have different ideas about the rule. Some people like the rule  48   they think it will make the street much safer. But some people are not  49 the new rule at all. One rider said, "I don’ t want to get a license or   50  , I don’ t like too many rules in life. " What’ s your idea, my friends?
小题1:
A.listenB.rideC.playD.bring
小题2:A. popular            B. hard          C difficult           D dangerous
小题3:
A.shareB.throwC.protectD.make
小题4:
A.messageB.adviceC.ruleD.letter
小题5:
A.aB.anC.theD./
小题6:
A.fasterB.fastC.fastestD.slowly
小题7: A. during           B. after             C. before       D in
小题8:
A.soB.becauseC.butD.and
小题9:
A.happy withB.worried aboutC.sorry aboutD.surprised at
小题10:
A.somethingB.nothingC.everythingD.anything
单项选择题