Last weekend, I had an interview with eye-doctor Professor Wang about our country primary and middle students’ short-sightedness. It is said that slightly more than 50% students, which ranks the No. 1 in the world, are short-sighted. Professor Wang said the reason of short-sightedness is complicated and three is still no cure for short-sightedness. He suggested that we should not overuse our eyes and do more outdoor exercises. What’s more, since the holding of pen has something to do with the short-sightedness, we need to pay attention to using the pen.