短文填空（共5小题；每小题1分，满分5分）
根据短文内容和首字母提示，把文中所缺词语补充出来，使短文完整、正确、通顺。（每空限填一词，并将单词的完整形式填写在答题卡内相应编号后的横线上。）
Nowadays, you can see many people busy on their smartphones(智能手机) if you look a . Smartphones make our lives easier. But have you ever t   about what they mean to your eyes?
Staring(盯) at smartphones for long time gives you dry eyes and even causes a disease c  glaucoma(青光眼).
While you’re probably not going to stop using your smartphone, there are a few things you can do to protect your eyes. Hold your phone at least 30 cm away from your eyes when using it. Take a break every h   and try the following: look at something at least five meters away from you and then focus on the tip of your nose. Repeat this s times. It should reduce(减少) the discomfort in your eyes.