患儿,4岁,平素无发绀,有多次肺炎病史,2天前出现发热、咳嗽、气促、烦躁。查体: 体温38.5℃,呼吸56次/分,必率168次/分,口唇发绀心音低钝,胸骨左缘三、四肋间可闻及Ⅲ/6级收缩期杂音,可触及震颤,P2亢进双肺中小水泡音,肝肋下2.5cm,有足背轻度水肿,最重要的处理为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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