Water is the1of all the things we eat and drink. Not many people understand this but2quite true. The human body3go without food for a long time. We've got many examples for this. Yet two4three days without water can usually make people5. Man can't live6water.

    Many people don't understand how7water the human body needs8work well, and many people, especially young people, do not drink enough,9in very hot weather. Our body is mostly water, about 65% to 75%. That is to say about two thirds of our body is water. When we do sports, some of the water will get away from our body.10we don't drink some water, we won't have enough water. If we don't have enough water, we'll feel tired and many of us will get ill. So you know how important water is to us.

    We'resitting too much and it's dangerous. Most Americans spend more than seven hourssitting every day, and the more you sit, the weaker your body will be.Fortunately, there are simple changes you can make during the day—anywhere, even at the workplace—to improve your health.

    Park a fewblocks away from the office each morning and walk to work.

    Thisallows you to start off your mornings actively and be ready to take on thework. If you take the bus, get off one stop earlier to take some light exercisebefore 8 a.m.

    Get up andmove around the office once every 60~90 minutes.

    Whenyou're busy with work, it's easy to forget the time. Set the alarm to remindyou to get up and take a walk around the office. You can use this time to fillup your water bottle or go to the bathroom.

    Askquestions and discuss questions face to face.

    Go to yourco-workers' office to discuss questions face to face, rather than send an emailevery time you have a question. This gives you a good excuse to move.

    Use yourlunch break to move around outside.

    So manyAmericans today work during their lunch break. When possible, take advantage ofthis time to walk outside and enjoy the nice weather. Fresh air can make youkeep a clear mind.

    Many of usdon't pay much attention to the importance of eye care. It is said that if youtake care of your body, then you can surely be healthy. That is why our eyesshould be given a lot of care. Natural eye care should be put in a number oneplace.

    There areseveral causes leading to poor eyesight like not enough food, genes (基因) and aging (老化). Televisions, computers and reading are also the causes of havingpoor eyesight. If you work in front of the computer, it is best to take a breakevery once in a while. Something dirty can cause redness and they will make youfeel uncomfortable. It is bad for your eyes too. If this happens, the best wayis to clean your eyes by using cold water. You must also try your best toprotect your eyes from harmful things. For example, sunglasses are not just forfashion but they can also serve as a great way to protect your eyesight fromultravioletrays.

    Eatinghealthy foods will do good to your eyesight. Remember that vitamins A, C and Eare good for eyes. Try to eat food groups that have these vitamins. And youshould do eye exercises because exercises protect your eyesight too. If aperson exercises regularly (定期地) and eats the right kind of food, his eyes will stay in goodcondition for a long time.

    All aboveare natural ways of eye care that help us keep healthy eyes. Being happy allthe time can be helpful to a person's eyesight too. In a word, eye care is veryimportant, no matter how old a person is.

How to keep on your exercise plan during winter? Here I'll give you some suggestions.

To stay active during the winter, you should first make it as easy as possible to do your exercise. Second, make something different before you {#blank#}1{#/blank#}doing exercise. The following advice will give you some ideas for making winter exercise more comfortable and more enjoyable.

Put your sports clothes in the dryer. If you want to exercise outside, you might keep the clothes in the dryer for a few minutes before that. It's often harder to {#blank#}2{#/blank#}when it's cold outside. {#blank#}3{#/blank#}clothes fresh from the dryer is just one way to get your body warm.

Take a hot shower. If it's really cold outside, you might even try a quick shower to get yourself warm before you do exercise.

Walk indoors. Walking is a good way to {#blank#}4{#/blank#}. To get out of cold weather of winter, you can simply walk indoors, probably in the living area of your room. Walking indoors makes you {#blank#}5{#/blank#}and gives a warm temperature to do it.

The weather is getting hotter and hotter. You are thirsty playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you are drinking. Something that looks cool may not be good for your health.

There are plenty of "energy drinks" advertisement on TV. Most of them have beautiful colors and cool names. They tell you they are helpful to your health. Sounds great and lots of people believe them!

But after a careful check you may find that most energy drinks have lots of caffeine (咖啡因) in them. These drinks are especially aimed at young people, students, busy people and sports players. Makers sometimes say their drinks make you better at sports and can keep you awake. But he careful not to drink too much.

Caffeine makes your heart beat fast. Because of this, the International Olympic Committee has limited (限制) its use. Caffeine in most energy drinks is as strong as that in a cup of coffee or tea. Possible health dangers have something to do with energy drinks. Just one box of energy drink can make you nervous, have difficulty sleeping and can even cause heart problems. Scientists say that teenagers should be discouraged from taking drinks with a lot of caffeine in them.