简述急性胃炎的诊断依据
确诊则有赖于急诊胃镜检查。一般应在出血后24~48小时内进行。胃镜表现为以多灶性糜烂、浅表溃疡和出血灶为特征的急性胃黏膜病变,黏膜活检组织学改变为急性炎症。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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