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抑郁症是一种情感性精神病,以悲伤、绝望和沮丧等情绪为特征。患者常有自卑、自责和自罪的感觉,并可有自杀倾向。抑郁症的主要类型有重型抑郁症、慢性和通常较轻的抑郁症(精神抑郁症)、以及非典型性抑郁症。其它重要类型有经前烦躁不安症(PDD)和周期性情感障碍(SAD)。
Depression is an emotional psychosis characterized by emotions such as sadness, despair and depression. Patients often feel inferior, self-blame and self-guilty, and may have a tendency to commit suicide. The major types of depression are major depression, chronic and usually mild depression (depression), and atypical depression. Other important types are premenstrual dysphoria (PDD) and periodic affective disorder (SAD).