手术体位不当可引起 __________ 和 __________ 两类并发症。
参考答案：生理 解剖
— Your coat is very nice!
— _______.
[ ]
A. No, it isn't
B. Yes, sure
C. Thank you
D. Not very nice
肛管直肠周围脓肿常继发于
A．肛裂
B．肛瘘
C．肛窦炎
D．嵌顿性内痣
E．直肠息肉继发感染
