单选题:毒感染伤口和肛门等处的皮肤时,正确的操作是(  )

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题目内容:
毒感染伤口和肛门等处的皮肤时,正确的操作是(  ) A.消毒范围为伤口周围10cm区域
B.延长切口时不必再扩大消毒范围
C.已接触污染部位的药液纱布,可返回消毒
D.由伤口或肛门四周围向中心区涂擦
E.由手术区中心部向四周涂擦

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