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单选题 患者男性,80岁。有慢性支气管炎病史20年。1周前受凉后再次出现咳嗽、咳痰,痰白质粘,伴有呼吸困难、胸闷、乏力。查体:口唇发绀,颈静脉怒张,双肺散在湿啰音。心率120次/分,律齐。肝肋下3cm,双下肢可见凹陷性水肿。对该患者的护理措施正确的是

A、 给予高浓度、低流量吸氧
B、 给予低热量、低蛋白、高维生素饮食
C、 适当使用镇静药、催眠药,缓解患者紧张情绪
D、 严密观察有无并发症发生
E、 加强体育锻炼

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