若手术时必须切断肛管直肠环时,以下操作哪一项是正确的:A.在前正中线切断B.在后正中线切断C.同时在肌肉环两处以上切断D.切开后用纱布填塞...

作者: rantiku 人气: - 评论: 0
问题 若手术时必须切断肛管直肠环时,以下操作哪一项是正确的:
选项 A.在前正中线切断 B.在后正中线切断 C.同时在肌肉环两处以上切断 D.切开后用纱布填塞 E.以上均正确
答案 B
解析

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