string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%AE%BA%E6%96%87%E5%BC%95%E7%94%A8%E6%80%8E%E4%B9%88%E6%A0%87%E6%B3%A8%E6%89%8D%E4%B8%8D%E4%BC%9A%E6%9F%A5%E9%87%8D => Failed to connect to 61.171.74.35 port 38041: Connection refused"
论文引用怎么标注才不会查重
