麦当劳回应涨价：15日起部分餐品价格增加0.5到1元

Group 1 - McDonald's has increased the prices of some menu items by 0.5 to 1 yuan starting from December 15 [1] - The price of the Double Cheeseburger in the "1+1 Flexible Combo" has risen by 1 yuan [1] Group 2 - Specific price changes include the Chicken McNuggets and other items, with some prices remaining unchanged [5] - The promotional pricing for certain combo meals has been adjusted, affecting the overall cost for customers [6]