患者男性,26岁。1个月前出现进食后上腹部胀痛,夜间常痛醒,进食后可以缓解,今日进食后感上腹饱胀,频繁呕吐宿食,初步诊断为( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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