男性,32岁,胃溃疡史3年,今突上腹剧痛,面色苍白,大汗。查体:全腹压痛,腹肌紧张,似穿孔。急性穿孔诊断后几小时内手术治疗效果最好()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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