精神忧郁症

例句：

1. 1. She was diagnosed with depression and started medication.
   她被诊断出患有抑郁症，并开始服用药物。
2. 2.He felt a deep melancholy over the loss of his parents.
   他对失去父母感到深深的悲伤。
3. 3. Mental illnesses are often overlooked in society.
   精神疾病在社会上往往被忽视。