“烟花三月下扬州”，小明游东关街时购买了如图所示的扬州三把刀（厨刀、修脚刀、理发刀），发现刀刃都很薄，这是为了____ ，手握位置都凹凸不平，这又是为了____ ．

阅读理解

    Look, there are some special days in April. April Fool's Day is on April 1^st. Children will have fun on that day. Easter is also in April. There will be an Easter party. Children will play many games. They will roll (滚动)Easter eggs and meet the Easter Bunny. What a happy party! When is the sports meet? It's on 21^st . That will be fun too. Everyone loves April.