患者,女,30岁,寒战、发热、腰痛伴尿频、尿急3天。体温39℃,心肺无异常。肝脾肋下未触及。两侧肋脊角有叩击痛。尿液检查:蛋白(-),镜检红细胞2~5/HP、白细胞l0~15/HP,诊断应首先考虑( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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