string(264) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%90%91%E7%A8%8B%E5%BA%8F%E5%8F%91%E9%80%81%E5%91%BD%E6%97%B6%E5%87%BA%E7%8E%B0%E9%97%AE%E9%A2%98 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
向程序发送命时出现问题
