string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=rank%E5%87%BD%E6%95%B0%E6%8E%92%E5%90%8D%E6%80%8E%E4%B9%88%E7%94%A8%E7%BB%9D%E5%AF%B9%E5%80%BC => Failed to connect to 101.91.112.32 port 38162: Connection refused"
rank函数排名怎么用绝对值
