题目内容

栓剂在肛门2cm处给药后，药物的吸收途径为

A. 药物→门静脉→肝脏→大循环
B. 药物→直肠下静脉和肛门静脉→肝脏→大循环
C. 药物→直肠下静脉和肛门静脉→下腔静脉→大循环
D. 药物→门静脉→直肠下静脉和肛门静脉→下腔大静脉→大循环
E. 药物→直肠上静脉→门静脉→大循环

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