患儿,2岁,因发热、咳嗽、咽痛3d入院。体检急性面容,体温39.2℃,咽后壁充血,双肺呼吸音略粗,无啰音。胸片显示肺纹理增多。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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