string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8F%82%E8%80%83%E6%96%87%E7%8C%AE%E6%80%8E%E4%B9%88%E5%BC%95%E7%94%A8%E6%89%8D%E4%B8%8D%E7%AE%97%E6%9F%A5%E9%87%8D => Failed to connect to 101.89.143.195 port 38109: Connection refused"
参考文献怎么引用才不算查重
