string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%98%BE%E7%A4%BA%E5%B1%8F%E5%B9%95%E9%97%AA%E7%83%81%E6%98%AF%E4%BB%80%E4%B9%88%E5%8E%9F%E5%9B%A0 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
显示屏幕闪烁是什么原因
