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【单选题】
患者女性,72岁,濒死期,呼吸浅表微弱,不易观察,测量呼吸的正确方法是 ( )A.
仔细听呼吸音并计数 ( )
B.
手置患者鼻孔前，感觉气流计数
C.
手按胸腹部，感觉起伏次数
D.
用少许棉纤维置患者鼻孔前观察吹动频率
E.
测脉率乘以1/4，推测呼吸次数
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