string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A5%A5%E8%BF%90%E4%BC%9A%E8%BF%91%E5%B9%B4%E4%B8%BE%E5%8A%9E%E5%9F%8E%E5%B8%82%E6%9C%89%E5%A4%9A%E5%B0%91%E4%B8%AA => Failed to connect to 101.89.159.206 port 38100: Connection refused"
奥运会近年举办城市有多少个
