旅游者都希望能将外地一些有地方风味的食品赠送亲友。但是众所皆知,大多数的糕点类食品,尤其是含油脂和糖分较多的米面糕点容易氧化变质,因此很难长期贮藏。以往,为解决这个问题,主要是将一些食品防腐剂掺合到糕点原料中。但这样处理 Tourists are hoping to give friends and relatives some local food in the field. However, it is well known that most pastry products, especially those containing more fat and sugar, tend to oxidize and deteriorate, making it difficult to store for long periods of time. In the past, in order to solve this problem, it is mainly to incorporate some food preservative into the pastry raw materials. But this way