男性,肠镜发现距肛门20cm左右有一单个基底较宽肠息肉,选用下列哪种治疗最好()
A.剖腹息肉单纯切除
B.电灼
C.圈厌器切除
D.部分结肠切除
E.观察随诊
参考答案:B
Mr. Black has been teaching English in a middle school _____ he came to China.
A.for ever
B.ever since
C.since then
D.long before
吗啡可用于治疗
A.分娩疼痛
B.便秘
C.心源性哮喘
D.颅内压升高
E.前列腺肥大