下列哪项不是痔形成的因素A.无静脉瓣B.静脉壁薄弱,结缔组织萎缩缺乏支持C.直肠上、下静脉丛畸形D.腹压增高E.直肠肛管慢性感染

作者: rantiku 人气: - 评论: 0
问题 下列哪项不是痔形成的因素
选项 A.无静脉瓣 B.静脉壁薄弱,结缔组织萎缩缺乏支持 C.直肠上、下静脉丛畸形 D.腹压增高 E.直肠肛管慢性感染
答案 C
解析

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