阿米巴性肝脓肿首选的治疗方法是().
A.抗阿米巴药物
B.手术切除
C.切开引流
D.穿刺引流
E.手术内引流
参考答案:A
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以下斜巷斜长符合运行人行车的有()
A.300m
B.500m
C.1000m