患儿女,18个月。牙龈、舌、唇、颊黏膜等处出现散在或成簇的小疱疹,水疱迅速破溃后形成浅溃疡,上面覆盖黄白色纤维素性渗出物,诊断为疱疹性口腔炎。护士在口腔涂药后应协助患儿闭口
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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