大便便质黑如柏油，或便血紫黑，此出血多见于A．肛裂B．胃脘C．内痔D．直肠E．外痔

作者: rantiku 人气: - 评论: 0

问题大便便质黑如柏油，或便血紫黑，此出血多见于

选项 A．肛裂 B．胃脘 C．内痔 D．直肠 E．外痔

答案 B

解析

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