患者,女,38岁,近3年时有发作性眩晕,伴耳鸣、听力减退、恶心呕吐及眼球震颤,每次发作持续3〜5天,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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