家乐福、沃尔玛、麦德龙店面数量比较 REGION CITY CARREFOUR WALLMART METRO TOTAL EAST shanghai 8 1 4 13 nanjing 1 1 1 3 wuxi 1 0 1 2 nantong 0 0 1 1 suzhou 1 0 0 1 hangzhou 1 0