患者女,26岁,停经52天,阴道有点滴出血3天,伴轻度下腹阵发性疼痛,尿妊娠试验(+)。查体:宫口闭,子宫如孕7周大小,最可能的诊断是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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