string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%AB%99%E6%8E%A8%E5%B9%BF%E7%AD%96%E7%95%A5%E4%B8%8E%E9%97%AE%E9%A2%98%E5%88%86%E6%9E%90 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
网站推广策略与问题分析
