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当前学科：心血管内科
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女，26岁，心悸、气短2年，今大咯血急诊。体查：血压16．0／10．7kPa（120／80mmHg），心率100次／分，律齐；心尖部有舒张期隆隆样杂音，P2亢进，肺底啰音。下列哪一项处理最为适宜（）
A . 静脉注射呋塞米（速尿）
B . 血管升压素（垂体后叶素）静脉注射
C . 静脉注射酚磺胺（原称止血敏）
D . 输血
E . 吗啡
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