string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%80%89%E6%8B%A9%E4%B8%A4%E7%BB%84%E5%85%B3%E8%81%94%E8%AF%8D%E9%80%A0%E5%8F%A5 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
选择两组关联词造句
