string(276) "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%8F%91%E7%94%9F%E9%94%99%E8%AF%AF => Failed to connect to 101.89.159.206 port 38100: Connection refused"
向程序发送命令时发生错误
