Many young people use computers, but few of them know how to look after them. Remember the following when you use your computer. *Keep your computer in a cool room. Too much or too little heat is bad for computers. Most computers work best at a temperature of 5 oC--30 oC. *Don't let people smoke cigarette near your computer. Smoke of all kinds is very bad for many parts of a computer and can cause many problems. *Don't eat or drink when you are near your computer. Pieces of food and a little water in the keyboard can also cause many problems. *Make sure the screen is the correct distance from your eyes. If you wear glasses, make sure these glasses are correct for using with the computer. Some people use a different pair of glasses when they use a computer. *Keep your screen clean and don't have it too bright. A dirty screen can hurt your eyes. A very bright screen can also be bad for your eyes. According to the passage you should use your computer  _  .
in a small room in a big room in a cool room below 5oC