患儿,女.7岁,右下腹剧烈疼痛3天,伴呕吐,为食物。体检全腹轻压痛 ,但有肌紧张。外周血WBC 13X109/L,N 0.92,拟为急性阑尾炎,行剖腹探查,未见明确病灶。手术后第4天,双下肢出现散在米粒至黄豆大小紫红色丘疹,压不视色,腹部检查无阳性发现,此时应考虑
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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