string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%9A%E4%BD%99%E6%97%B6%E9%97%B4%E5%81%9A%E7%82%B9%E4%BB%80%E4%B9%88%E5%A5%BD%E5%91%A2 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
业余时间做点什么好呢
