string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%AE%A1%E7%90%86%E6%80%9D%E7%BB%B4%E7%9A%84%E7%89%B9%E7%82%B9%E5%8C%85%E6%8B%AC => Failed to connect to 61.171.74.35 port 38027: Connection refused"
管理思维的特点包括
