Write an English composition about unhealthy living habits of college students, such as staying up late, spending too much money and indulging in games.

1. For example, an irregular diet is harmful to the health of young people. When you are young, you can't see that you will get stomach trouble and enteritis after 35 years old.

2, irregular sleep: irregular sleep, older will cause heart and brain diseases.

3, departments can learn unilaterally, not simply master the knowledge in books, because most of the knowledge learned in school is not used in society.