患者,男,56岁。肝硬化病史5年。近1周来腹围增大,发热伴寒战,腹痛,腹泻。体检: 体温38.8℃,全腹有压痛。腹水为黄色微浑浊液体。为明确诊断应选择的检查是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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