最短的距离是圆的4

{"name":"\u6700\u77ed\u7684\u8ddd\u79bb\u662f\u5706\u76844","type":"\u795e\u8bdd\u5267","area":"\u65e5\u672c","year":"2010","lang":"\u6cf0\u8bed","play":"1080P\u8d85\u6e05","type1":"\u795e\u8bdd\u5267"}