string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AD%A6%E7%94%B5%E8%84%91%E5%9F%BA%E7%A1%80%E7%9F%A5%E8%AF%86%E7%9A%84%E6%96%B9%E6%B3%95%E4%B8%8E%E6%AD%A5%E9%AA%A4 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
学电脑基础知识的方法与步骤
