I can’t eat, sleep, depressed, easily fatigued, no energy, low efficiency, nervousness and anxiety, depression, winter, the whole person’s mood as if on a jumping machine, a down to the bottom. I can’t help but look up to the sky and ask, “What is wrong with me? Is it depression? Stop, don’t think so serious, maybe you just have the seasonal “mood flu” – seasonal affective disorder. Don’t worry, whisper it to you, as long as the “emotional flu” does not affect your normal academic life, survive the winter, it will naturally disappear.