题目内容

女，72岁，有慢性咳喘史30余年，咳喘加重1周，体查：神清、唇紫绀、桶状胸、剑突下可见搏动，双肺可闻湿性罗音，心率112次／分，节律不齐，心音强弱不等，肝肋下1厘米，双下肢浮肿，下列哪种治疗最恰当

A. 立即用高浓度吸氧
B. 积极抗感染，保持呼吸道畅通
C. 立即速尿静脉注射，消除水肿
D. 立即用西地兰纠正房颤
E. 立即注射地塞米松

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男性，60岁，既往有慢性支气管炎病史l0年，一周前因感冒后咳嗽加重,痰量增加，神志模糊，两肺哮鸣音，心率120次／分，血气分析：pH7．30，PaO2 50mmHg，PaCO2 80mmHg。下列处理要点首要的是

A. 静脉滴注呼吸兴奋剂
B. 保持呼吸道通畅
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