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【单选题】
奥美拉唑治疗消化性溃疡，其作用是A.
阻断H 2 受体，抑制胃酸分泌
B.
抑制后胃壁细胞H + 泵功能，减少胃酸分泌
C.
阻断M 1 受体，减少胃酸分泌
D.
阻断H 1 受体减少胃酸分泌
E.
使胃黏液分泌增加，保护溃疡面
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