string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%9D%E7%BA%A7%E4%BC%9A%E8%AE%A1%E5%9F%BA%E7%A1%80%E7%9F%A5%E8%AF%86%E5%BF%85%E8%83%8C%E9%87%8D%E7%82%B9 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
初级会计基础知识必背重点
