翻译一下这句话,用三句话表达,请不要用自动翻译.（近视原因很复杂,没有哪一种药可以治疗它,建议不要过度用眼和多参加户外活

近视原因很复杂,没有哪一种药可以治疗它,建议不要过度用眼和多参加户外活动,如何握笔也和近视有关
The reason of myopia is very complicated, no medicine can heal it. It's advised that your eyes should not be overused and should exercise more in the open air. It's also related to the way you hold the pen.

Myopia causes are complex, and there is no a kind of medicine can treat it, suggest not excessive use eye, to participate in more outdoor activities, how to hold a pen is also related to myopia)

Myopia complicated reasons, no drugs to treat it, suggest not excessive use eye and to participate in outdoor activities, how to hold a pen and myopic