string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E8%84%91%E5%85%A5%E9%97%A8%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B%E7%94%B5%E5%AD%90%E4%B9%A6 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
电脑入门基础教程电子书
