患者,女,40岁。餐后突感上腹剧痛,腹痛向腰部放射,伴恶心,呕吐胃内容物。为明确诊断应首先选择的检查是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧