string(256) "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%E4%BA%AE%E5%BA%A6%E6%80%8E%E4%B9%88%E8%B0%83%E6%95%B4 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
显示屏幕亮度怎么调整
