string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E5%81%9A%E6%8E%A8%E5%B9%BF%E6%95%88%E6%9E%9C%E5%A5%BD => Failed to connect to 61.171.74.35 port 38027: Connection refused"
怎么做推广效果好
