观后感，就是看了一部影片或连续剧后，把具体感受和得到的启示写成的文章。所谓“感”，可以是从作品中领悟出来的道理或精湛的思想，可以是受作品中的内容启发而引起的思考与联想，可以是因观看而激发的决心和理想，也可以是因观看而引起的对社会上某些丑恶现象的抨击。观后感的表达方式灵活多样，基本属于议论范畴，但写法不同于一般议论文，因为它必须是在观看后的基础上发感想。简单来说就是观赏过后的感触。

<National Treasure> is an adventure film. The main character, Nicolas Cage, is a world-famous actor. Many people went to the cinema to watch it as soon as the film has been on because of him.
In this film. Ben Gates(Nicolas Cage) is looking for a treasure in somewhere which is buried with three person who are important to America: George Washington, Thomas Jefferson and Benjamin Franklin.
Many bad people impede him. But finally, he gets the national treasure. He overcomes any difficulties.
This film not only makes me frightened and interested but also reminds me of a famous of Helen Keller: Although the world is full of suffering, it is full also of the overcoming of it.