Nowadays,more and more students were addicted to the computer games which brought a huge damage to them.Firstly,a spate of time which was supposed to spend on their studying unfortunately was wasted on the on-line games,which can serve as a crucial reason why mostly pupils got lower grades in the school.Secondly,with sitting in front of a computer for a long time every day,a rapidly decrease to their eyesight became a big problem,even worse,it can cause some other disease to their health like obesity.