患儿,女性,8个月。因烦躁、呼吸困难入院。查体:体温39.7℃,心率l90/min,呼吸67/min,烦躁不安,面色发绀,呼吸困难,心音低钝,肝在肋下。胸X线片示双肺大小不等片状阴影。最可能的诊断是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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