Vacation syndrome refers to fatigue, insomnia and other symptoms that appear after long holidays or festivals, leading to anxiety, emptiness or easy anger, difficulty concentrating on work. It is the psychological discomfort that people can not withstand the pressure of work after a long period of leisure.
According to the above definition, which of the followings is a vacation syndrome?
Jack had a great time during the Spring Festival, but he was always absent-minded after backing to work.