string(337) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%A8%E4%B8%8D%E5%90%8C%E7%9A%84%E5%85%B3%E8%81%94%E8%AF%8D%E8%AF%AD%E6%8A%8A%E4%B8%A4%E4%B8%AA%E5%8F%A5%E5%AD%90%E5%90%88%E5%B9%B6%E6%88%90%E4%B8%80%E5%8F%A5%E8%AF%9D => Failed to connect to 14.18.117.71 port 38041: Connection refused"
用不同的关联词语把两个句子合并成一句话
