string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%AE%E6%A0%87%E7%BE%A4%E4%BD%93%E6%9C%89%E5%93%AA%E4%BA%9B%E4%BA%BA => Failed to connect to 101.89.159.206 port 38187: Connection refused"
目标群体有哪些人
