string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%B3%E9%94%AE%E8%AF%8D%E6%80%8E%E4%B9%88%E6%9F%A5%E8%AF%A2%E7%9C%9F%E4%BC%AA => Failed to connect to 101.89.117.144 port 38005: Connection refused"
关键词怎么查询真伪
