You're Happy, Zhenka!(1984)

Original title: Счастливая, Женька!

Zhenya is divorced a long time ago, raising her five-year-old son alone, working in a clinic, and part-time as an ambulance worker. She is an optimist and doesn’t complain about life, which is why her colleagues call her happy. Zhenya's unexpected meeting with a new doctor can probably change her life a lot.