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Shortsightedness（近视） has become one of the main health problems for students. It’s important to avoid serious shortsightedness and keep your eyes healthy.
Cut down your time on the screens. Nowadays, many students spend too much time on computer games or online classes. “They always make their eyes focus on screens for a long time. It may cause dry eyes,” said Xu Hong, an eye doctor.
Remember to relax your eyes. Facts show that people blink（眨眼）less when they’re looking at screens or reading books.
Try to see eye doctors regularly. Learn more about your eyes and ask your doctors questions.
| A．Because your eyes need a good rest |
| B．So spend less time on screens and give your eyes a break every 30 minutes |
| C．Eat more foods that are good for your eyes |
| D．For example, how often do you use the Internet |
| E．And using your eyes for a long time leads to shortsightedness more easily |
| F．Here is some advice about how to stop and control shortsightedness |
| G．For example, when should you change your glasses |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
