string(354) "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%E4%BB%A4%E6%97%B6%E5%87%BA%E7%8E%B0%E9%97%AE%E9%A2%98%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%E5%95%8A%E6%80%8E%E4%B9%88%E8%A7%A3%E5%86%B3 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
向程序发送命令时出现问题什么意思啊怎么解决
