入院后第三天，病人有过全身性抽搐发作，随后发生过一性知觉丧失。
On the third day of admission he had an attack of generalized convulsions, followed by transitory unconsciousness. Followed by transitory unconsciousness.
单纯的脑震荡可引起短时间的知觉丧失，而缺氧可以造成长达数周的昏迷，并常致命。
Simple concussions cause short losses of consciousness. Coma from lack of oxygen may last several weeks and is often fatal.
脑血管破裂或阻塞可致突然的知觉丧失，而代谢异常（如糖尿病）或脑肿瘤所引起的昏迷则发病缓慢。
Coma caused by stroke can be sudden, while that caused by metabolic abnormalities (as in diabetes mellitus) or cerebral tumours comes on gradually.
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