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【单选题】
下列哪并发人流综合征的主要原因A.
受术者高度精神紧张
B.
受术者冠状动脉痉挛
C.
人工流产,术中子宫穿孔
D.
人工流产术中出血过多,吸宫不全,羊水栓塞
E.
人工流产术中对子宫,局部受机械刺激引起迷走神经兴奋
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