混合痔宜用（）
A.贯穿结扎法
B.注射法
C.静脉丛切除术
D.外剥内扎术
E.切开疗法
参考答案：D
Willpower is a kind of quality, _____ is _____ it takes to do anything well. [ ]
A. what; which
B. what; what
C. which; which
D. which; what
以下不属于呃逆的常见原因的是
A．偶感风寒
B．热邪客胃
C．胃气衰败
D．脾失健运
E．寒邪客胃
