患者,男性,63岁,胃溃疡多年。今晨突发腹部剧痛后无力,面色苍白,急诊入院。护士急查血压70/45mmHg,体温正常,腹部移动性浊音阳性,该护士判断患者可能发生了( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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