直肠肛管疾病护理错误的是（）。

A.以37℃水温坐浴

B.直肠镜检前应先排便或灌肠

C.体弱者以左侧卧位行直肠指检

D.肛瘘术后，应保持引流通畅

E.术后应注意伤口出血情况

—You look unhappy.           ?          

—I have so much homework to do that I couldn't play soccer.           [ ]

A. Do you feel sad          

B. Are you ill          

C. What's the'matter