患者男性,62岁。因肺炎用抗生素连续治疗,近日发现口腔黏膜有白色附着物,用棉签拭去附着物可见出血。考虑口腔病变是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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