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综合：基于满意度的智能换菜建议

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示例

输入
solve()
期望输出
Smart dish replacement suggestions:
  Low rated dishes (avg<3.5): 5
  红烧肉: avg_rating=1.0 -> Suggest: replace with higher-rated option
  剁椒鱼头: avg_rating=1.67 -> Suggest: replace with higher-rated option
  酸辣白菜: avg_rating=2.0 -> Suggest: replace with higher-rated option
  银耳汤: avg_rating=2.0 -> Suggest: replace with higher-rated option
  葱油饼: avg_rating=2.33 -> Suggest: replace with higher-rated option
  Keep/promote high rated:
    冬瓜汤: avg_rating=5.0
    油条: avg_rating=5.0
    炒米粉: avg_rating=4.75
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