患儿,1岁,发热15天,咳嗽伴轻度喘憋。查体:浅表淋巴结有轻度肿大,双肺未闻啰音,胸片提示肺门影增大此患儿未接种卡介苗,首选的检查是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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