string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B7%A5%E4%BD%9C%E7%9A%84%E4%B8%8D%E8%B6%B3%E4%B9%8B%E5%A4%84%E6%80%BB%E7%BB%93 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
工作的不足之处总结
