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If you don't keep yourself warm enough, winter can be a time to have an illness. During the winter months, people{#blank#}1{#/blank#} get colds and flu(流感). Many people think they are the same, but they are{#blank#}2{#/blank#}.

Colds can stay with you for up to a week. You will have a running nose, a sore throat, a headache, a cough and a fever.

Flu is {#blank#}3{#/blank#} serious. You will feel sick very quickly. You will have a fever and a headache. Your body will {#blank#}4{#/blank#} and become weak. This could last for up to four weeks.

Is there any way to keep yourself away from colds and flu? Staying clear of(避开) {#blank#}5{#/blank#}with colds or flu may work. Try not to touch(触摸) your nose or eyes if you have been close to {#blank#}6{#/blank#} who has a cold. Wash your hands, especially after {#blank#}7{#/blank#} your nose. Going out with {#blank#}8{#/blank#} hair can also give you a cold!

If you catch a cold or flu, go to bed and rest. Doing this will help you get {#blank#}9{#/blank#}. Drink lots of water. Stay in a warm, well-aired room. If you have a headache, or your muscles(肌肉) hurt, don't forget {#blank#}10{#/blank#} some medicine.

    Make sure that the keyboard and the screen are in the right height for you. If they are not, you will get a backache.

    Make sure the screen is in the correct{#blank#}1{#/blank#}from your eyes. If you wear glasses, make sure these glasses are suitable for using the computer. Some people use a{#blank#}2{#/blank#}pair of glasses when they use a computer.

    Keep your screen clean and do not have it too bright. A dirty screen can hurt your eyes. A very bright screen can also be bad for your eyes. If you can{#blank#}3{#/blank#}one, buy a computer screen. It will be better for you than using the screen of a TV set.

    When you use any software, you must{#blank#}4{#/blank#}because some software can cause viruses in the computer. If your computer has viruses, it won't work or might even break down.