— Why are you often dressed in white?  

— Because I think white can help me_______ when I feel stressed.

A．fall down

B．calm down

C．look down

D．come down

患者，男性，25岁，近一个月来自觉肛门瘙痒不适，偶有气体溢出，直肠指诊可触及黏膜下一较硬条索。

该患者可能发生了（）。

A.直肠癌

B.低位肛瘘

C.二期内痔

D.高位肛瘘

E.坐骨肛管间隙脓肿