请你根据以下提示，结合生活中的一个事例，用英语写一篇短文，谈谈微笑的作用。

　　The best example of universally understood body language may be the smile. A smile can help us get through difficult situations and find friends in a world of strangers. A smile can open doors and tear down walls.

　　【参考范文】

　　No body language can be more attractive/ fascinating than smiling. Not only can a beautiful smile make ourselves happy, but also it enables others to feel delighted. Sometimes when a smile is so powerful that it gives people suffering from disasters great courage.

　　A little boy named Lang Zheng, for instance, impressed and encouraged a great many people when a serious earthquake happened in Wenchuan / overtook Wenchuan. Right after he was rescued by the soldiers from the ruins, he saluted and smiled to them. His smile was like sunshine which warmed people who were in sadness.

　　It is safe/ no exaggeration to say that without smile our life would be colorless and difficult. It is suggested that we smile as much as possible.