computer harmful if exposure is excessive
Plan for resting period regularly and try not to use continously for a long period of time. Plan for period of rest, improve typing speed ( send children and ourself to typing school to improve typing ability)...wishing you healthy.
*****
每天用电脑超4小时的朋友.
三年后得到癌症的机率比正常人多26﹪。
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