the use of smartphones gives us a lot of benefits, but on the other hand it has incalculable harm. It alters biological clock, making us lose sleep and deep sleep problems. many smartphone usage can make our vision impairment. in addition, it also affects the spinal bone pain, hurt the fingers and knuckles. it also affects the health of pregnant women risk miscarriage and cause cancer. It makes our skin deteriorate, reducing the body's immune. children or smartphone users can suffer from depression, reduced ability thinking ability, poor intellectual development. if we sit around too long to use smartphone can cause obesity. the abuse of smartphones has led to people we encounter incalculable harm, to restrict, limit your exposure to it.
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