题目内容

患者男性，63岁。因呼衰、慢阻肺收入院。现神志淡漠，嗜睡，血气分析示Ⅱ型呼衰，关于呼吸衰竭发生机制描述不正确的是

A. 肺泡通气不足
B. 通气/血流＜0.8
C. 通气/血流＝0.8
D. 通气/血流＞0.8
E. 气体弥散障碍

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