2.定义/诊断 Prolonged anhedonia (the inability to experience pleasure), hopelessness,and failure to experience an increase in mood in response positive events rarely accompany "normal"sadness. ·无法体验快感 ·不正常的悲伤 ·单极抑郁症Unipolar depression ·双极抑郁症Bipolar depression ·重症抑郁症Major depression2. 定义/诊断 • Prolonged anhedonia (the inability to experience pleasure), hopelessness, and failure to experience an increase in mood in response positive events rarely accompany "normal" sadness. • 无法体验快感 • 不正常的悲伤 • 单极抑郁症 Unipolar depression • 双极抑郁症 Bipolar depression • 重症抑郁症 Major depression