肛裂发生原因为
A.直肠镜检查引起肛管表浅皮肤裂开
B.排便用力过猛,肛管受到较深的裂伤
C.肛管皮肤较薄
D.粪便干硬
E.肛窦炎致肛管皮下脓肿破溃
参考答案:D,E
用所给词的适当形式填空
1. —What ______ (happen) to Jim last night?
—He fell down and hurt his leg.
2. By the time he got to school, classes______ already ______ ( start).
3. I ______( work) out five math problems by the time the teacher came in.
4. When I got up this morning, my brother ______( got) into the bathroom.
5. By the end of last term, we ______(learn)many English words.
最恰当的处理是
A.确诊后即行人工破膜B.人工破膜及静脉滴注缩宫素C.期待疗法D.尽快剖宫产术E.卧床休息、吸氧