Are you a student in our school? If so, the library is definitely the best choice, with air conditioning, quiet atmosphere and reference books at your fingertips. You can also go to the 2-5 floors of Teaching One for self-study. Don't look at those desks and drawers full of books. In fact, many people have gone home. You can completely ignore them and just put your schoolbag beside you. Other teaching buildings are closed on holidays.