string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9C%BC%E4%B8%8B%E5%B7%B2%E7%BB%8F%E5%BD%A2%E6%88%90%E7%9A%84%E5%B9%B2%E7%BA%B9%E6%80%8E%E4%B9%88%E5%8E%BB%E9%99%A4 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
眼下已经形成的干纹怎么去除
