肛门直肠手术时的常用体位是

A．外吹乳痈
B．内吹乳痈
C．不乳儿乳痈
D． * * 破裂乳痈
E．席风呵乳

As we know, Mark is a ______ investor (投资者) who does research on market before he buys things[ ]

A. lucky      

B. generous    

C. patient          

D. cautious