string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8F%B7%E7%A0%81%E6%A0%87%E8%AE%B0%E6%B8%85%E9%99%A4%E5%B9%B3%E5%8F%B0%E5%AE%98%E7%BD%91 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
号码标记清除平台官网
