string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%B6%E4%BD%9C%E8%A1%A8%E6%A0%BC%E7%9A%84%E5%B0%8F%E6%8A%80%E5%B7%A7 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
制作表格的小技巧
