string(235) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E4%BA%8C%E5%BB%BA%E5%85%AC%E8%B7%AF%E6%A1%88%E4%BE%8B%E4%B8%89 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2020二建公路案例三
