患者,男,30岁,持续发热20天,伴有周身不适,巩膜轻度黄染,体温39℃,神志清,表情淡漠,肝肋下2.0cm,脾肋下1.0cm,白细胞3.0×10⁹/L,中性80%,淋巴20%。为明确诊断,应首选的检查为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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