效果图如下：
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</head><body><style>html,body,#main {width: 100%;height: 100%;margin: 0;}</style><div id='main'></div><script>var data = [{name: '海门',value: 9},{name: '鄂尔多斯',value: 12},{name: '招远',value: 12},{name: '舟山',value: 12},{name: '齐齐哈尔',value: 14},{name: '盐城',value: 15},{name: '赤峰',value: 16},{name: '青岛',value: 18},{name: '乳山',value: 18},{name: '金昌',value: 19},{name: '泉州',value: 21},{name: '莱西',value: 21},{name: '日照',value: 21},{name: '胶南',value: 22},{name: '南通',value: 23},{name: '拉萨',value: 24},{name: '云浮',value: 24},{name: '梅州',value: 25},{name: '文登',value: 25},{name: '上海',value: 25},{name: '攀枝花',value: 25},{name: '威海',value: 25},{name: '承德',value: 25},{name: '厦门',value: 26},{name: '汕尾',value: 26},{name: '潮州',value: 26},{name: '丹东',value: 27},{name: '太仓',value: 27},{name: '曲靖',value: 27},{name: '烟台',value: 28},{name: '福州',value: 29},{name: '瓦房店',value: 30},{name: '即墨',value: 30},{name: '抚顺',value: 31},{name: '玉溪',value: 31},{name: '张家口',value: 31},{name: '阳泉',value: 31},{name: '莱州',value: 32},{name: '湖州',value: 32},{name: '汕头',value: 32},{name: '昆山',value: 33},{name: '宁波',value: 33},{name: '湛江',value: 33},{name: '揭阳',value: 34},{name: '荣成',value: 34},{name: '连云港',value: 35},{name: '葫芦岛',value: 35},{name: '常熟',value: 36},{name: '东莞',value: 36},{name: '河源',value: 36},{name: '淮安',value: 36},{name: '泰州',value: 36},{name: '南宁',value: 37},{name: '营口',value: 37},{name: '惠州',value: 37},{name: '江阴',value: 37},{name: '蓬莱',value: 37},{name: '韶关',value: 38},{name: '嘉峪关',value: 38},{name: '广州',value: 38},{name: '延安',value: 38},{name: '太原',value: 39},{name: '清远',value: 39},{name: '中山',value: 39},{name: '昆明',value: 39},{name: '寿光',value: 40},{name: '盘锦',value: 40},{name: '长治',value: 41},{name: '深圳',value: 41},{name: '珠海',value: 42},{name: '宿迁',value: 43},{name: '咸阳',value: 43},{name: '铜川',value: 44},{name: '平度',value: 44},{name: '佛山',value: 44},{name: '海口',value: 44},{name: '江门',value: 45},{name: '章丘',value: 45},{name: '肇庆',value: 46},{name: '大连',value: 47},{name: '临汾',value: 47},{name: '吴江',value: 47},{name: '石嘴山',value: 49},{name: '沈阳',value: 50},{name: '苏州',value: 50},{name: '茂名',value: 50},{name: '嘉兴',value: 51},{name: '长春',value: 51},{name: '胶州',value: 52},{name: '银川',value: 52},{name: '张家港',value: 52},{name: '三门峡',value: 53},{name: '锦州',value: 54},{name: '南昌',value: 54},{name: '柳州',value: 54},{name: '三亚',value: 54},{name: '自贡',value: 56},{name: '吉林',value: 56},{name: '阳江',value: 57},{name: '泸州',value: 57},{name: '西宁',value: 57},{name: '宜宾',value: 58},{name: '呼和浩特',value: 58},{name: '成都',value: 58},{name: '大同',value: 58},{name: '镇江',value: 59},{name: '桂林',value: 59},{name: '张家界',value: 59},{name: '宜兴',value: 59},{name: '北海',value: 60},{name: '西安',value: 61},{name: '金坛',value: 62},{name: '东营',value: 62},{name: '牡丹江',value: 63},{name: '遵义',value: 63},{name: '绍兴',value: 63},{name: '扬州',value: 64},{name: '常州',value: 64},{name: '潍坊',value: 65},{name: '重庆',value: 66},{name: '台州',value: 67},{name: '南京',value: 67},{name: '滨州',value: 70},{name: '贵阳',value: 71},{name: '无锡',value: 71},{name: '本溪',value: 71},{name: '克拉玛依',value: 72},{name: '渭南',value: 72},{name: '马鞍山',value: 72},{name: '宝鸡',value: 72},{name: '焦作',value: 75},{name: '句容',value: 75},{name: '北京',value: 79},{name: '徐州',value: 79},{name: '衡水',value: 80},{name: '包头',value: 80},{name: '绵阳',value: 80},{name: '乌鲁木齐',value: 84},{name: '枣庄',value: 84},{name: '杭州',value: 84},{name: '淄博',value: 85},{name: '鞍山',value: 86},{name: '溧阳',value: 86},{name: '库尔勒',value: 86},{name: '安阳',value: 90},{name: '开封',value: 90},{name: '济南',value: 92},{name: '德阳',value: 93},{name: '温州',value: 95},{name: '九江',value: 96},{name: '邯郸',value: 98},{name: '临安',value: 99},{name: '兰州',value: 99},{name: '沧州',value: 100},{name: '临沂',value: 103},{name: '南充',value: 104},{name: '天津',value: 105},{name: '富阳',value: 106},{name: '泰安',value: 112},{name: '诸暨',value: 112},{name: '郑州',value: 113},{name: '哈尔滨',value: 114},{name: '聊城',value: 116},{name: '芜湖',value: 117},{name: '唐山',value: 119},{name: '平顶山',value: 119},{name: 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