给你的原文重新写一下
How to control kids' internet indulge （怎么防止孩子沉迷网络）
I have at his（her）thirteenth.我有个13岁的小盆友（这句话就不必提你是父母之一了,那个表达绕嘴） The winter vacation is coming.寒假来了（The,挑明了是孩子的假期） We couple both work at daytime.我们夫妇（按你的语境猜测你是双职工）He （she）is staying home alone during the period.这段时间孩子自己在家What steps should I take limiting his（her）time online .我要采取哪些步骤控制Ta的上网时间.
My suggestions（我的建议）
1,If you are somehow expertised on computer operating system.You set up couple of other users accout defined them with different scale of privilege.To do this ,you need
to open control panel and find out both internet and user account options.For detail consult computer expert.Or just simply to strike a few related words on your keyboard,you can meet many computer genius willing for helps.
2,Otherwise,you are on rock.不写了.留作业叫他没时间