患者,男,50岁。酒后上腹痛伴腹胀8小时,查体:上腹压痛,肌紧张,反跳痛(+),血压120/80mmHg,脉搏88次/分,血淀粉酶500U/L。对判定预后有帮助的指标是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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