A tiger is a kind of catamount animal. It looks like a cat, but much bigger than a cat. A tiger is very ferocious and it eats mainly meat. It has yellow and black streaks all over its body and it looks very beautiful. Its tail is long and strong and it can hit its quarry dying.
Tigers live in the thick forests and small animals in the forests are tigers' food.
During the past years, many forests have been cut down and the living conditions of the tigers are becoming worse and worse. There are fewer tigers left in the world now. Tigers are the animals of the world, and they should have their own living spaces. We must do our best to protect the tigers and their living environment.
俗话说:“眼睛是心灵的窗户”,但我们该怎样保护好这“心灵的窗户”呢?在此,我教大家一些护眼的方法。
大家往往以为,只要放下课本或作业,就是休息眼睛了,比如看课外书、玩会儿电脑,甚至闭目养神。其实,这样只能是大脑得到休息,眼睛却依然“超负荷运转”。要想真正休息,最好的方法是看 5米以外的东西。许多人错误地认为,绿色对眼睛有好处,就是绿色本身对眼睛有什么好处,其实是指远眺大自然的景物可缓解眼睛的疲劳状态。如果看33厘米以内的东西,即使是绿色的,对眼睛也无益。
此外,我再给大家一些建议:
1. 切忌“目不转睛”,要经常眨眼,因为眨眼可减少眼球暴露于空气的时间,避免泪液蒸发。
2.不要吹太久的空调,并在座位附近放上茶水,用未增加周围的湿度。
3.多吃水果、蔬菜、粮食、鱼和鸡蛋。这样可以减轻眼睛干燥的程度。
4.保证睡眠的充足。
5.避免长时间用电脑。
来吧,让我们手拉手,摆脱眼睛的束缚!
如果,一双美丽的眼睛,不慎瞎了,那会是多么痛苦啊!所以,我们要细心的保护这双美丽的眼睛。不在强烈的或太暗的光线下看书、写字;
读写姿势要坐端正,眼与书之间要保持30厘米以上的`距离;
不躺着看书,乘车走路时不看书;
读写时间不宜过长,每隔50分钟左右要放松休息一下,或是做做眼保健操,或是到窗前眺望远处;
不要长时间观看电视节目、操作电脑和玩电子游戏;
注意防止眼外伤,异物入眼要用正确的方法处理;
不用手揉眼睛,不用脏手帕或脏毛巾擦眼睛;
不与他人共用毛巾、脸盆等浴具;
不直视太阳,尤其是在正午,以免烧伤眼睛;
患上眼疾要及时医治,同时注意不要将病菌传染给他人。
每隔1小时休息一下双眼,不要持续操作。持续使用电脑时,要经常眨眨眼睛,防止眼睛干涩。眼睛距离35厘米大的屏幕不应少于60厘米,距离38厘米大的屏幕不应少于70厘米。屏幕应放在略低于视平线的位置。将屏幕的亮度与清晰度调整到适当水平,以眼睛感到舒适为准。要经常擦拭屏幕。屏幕过脏会使图像模糊,造成眼睛疲劳。
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