string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%BE%BD%E5%AE%81%E7%9C%81%E6%9C%80%E6%9C%89%E5%8F%91%E5%B1%95%E7%9A%84%E5%9F%8E%E5%B8%82%E6%98%AF%E5%93%AA => Failed to connect to 14.18.117.71 port 38041: Connection refused"
辽宁省最有发展的城市是哪
