患儿,4个月,支气管肺炎,突然烦躁不安,呼吸急促,面色苍白,三凹征明显。心率190/min,心音低钝,肝肋下4cm。该患儿可能并发了( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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