求翻译：我的父亲是个医生,工作勤勤肯肯,经常早出晚归.他不仅对自己而且对工作严格要求，他总是为病人着想，为病人减轻痛苦，使得他们重返正常生活。是什么意思？

My father is a doctor, Kan Kan Kenken, regularly go out in the morning and return in the evening. not only did he set strict demands on themselves but also for work, he always thinks of patients, for patients to alleviate suffering, they return to normal life.