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阅读下文并回答问题。

National Eye Care Day on June 6th is a good chance for us to improve our eye health . What are common eye problems we have today ? How can we protect our eyes ? Read on to find out the answer .

Eyes are important in our everyday life . We use them to read books , see colors and view the wonders of the world . But sometimes , we use them too much and it hurts them .

In the past , nearsightedness(近视)was a common eye problem among children . This is mostly because of their bad eye habits , such as watching TV too long and reading books in bed .

However , today’s technology is changing the way we live . Children spend more time working and playing in front of computers , smart phones and iPads . US children spend more than 42 hours a week in front of electronic screens(电子屏幕), US’ABC news reported .

This has caused a new problem for our eyes : digital(数字的)eyestrain(眼疲劳). People with digital eyestrain may get headaches , dry and red eyes , eye pain , watering and other eye problems .

But don’t worry . The following tips can help you protect your eyes . Try them out .

Screen advice :

1. When you are watching electronic screens , keep them at least 30 cm from your eyes . Try not to use your smart phone in direct sunlight .

2. Blink(眨眼)more often when you are looking at the screen . This can help to stop dry eyes .

3. Remember to take a 20-20-20 break : every 20 minutes , take a 20-second break and look at something 20 feet ( about 6 meters ) away .

4. Spend less time in front of screens . One to two hours a day is OK for your eyes .

1. Do people get a good chance to care about their eye health on June 6th every year ?

____________________________________________________________________________

2.When is National Eye Care Day ?

____________________________________________________________________________

3.Why was nearsightedness a common eye problem among children in the past ?

____________________________________________________________________________

4.How many times had you better take a break if you need to watch the electronic screens for one hour ?

____________________________________________________________________________

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