50岁农村母亲,目睹其犯罪儿子在家中被警察抓走,突然抽搐发作,但无意识丧失、咬舌、严重摔伤或小便失禁,这是 ( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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