string(258) "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%E6%9C%89%E7%94%A8%E5%90%97 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
学电脑基础知识有用吗
