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糖尿病(Diabetes)是一种代谢紊乱的疾病,常见特征包括:1. 频尿(Polyuria):尿量明显增加,有时夜间多尿,尿量达1.5~5升/天。2. 喉渴(Polydipsia):口渴欲饮水,而且喝水后不能解渴。3. 饥饿感(Polyphagia):饥饿感明显增加,常常感到饿得快速。4. 体重下降:慢性失代偿期糖尿病患者,尽管进食较多,体重仍会逐渐下降。5. 疲倦(Fatigue):体力逐渐下降,精神不振,经常感到疲劳。6. 黏膜干燥:口干、咽喉干痛、皮肤干燥、眼睛干涩等。7. 神经病变:感觉神经病变、运动神经病变、自主神经病变等,分别表现为手脚麻木、手指发麻、肢体无力、口齿不清、视网膜病变等。8. 慢性并发症:长期高血糖易导致心血管病变、肾脏病变、神经病变、视网膜病变等。