困难是什么？
                                                                  成功路上的拦路虎?
                                                                  还是面对生活的当头一棒？
                                                                  不，不是，
                                                                  它只是一个沙粒，
                                                                  一个很小很小的沙粒，
                                                                  只要我们努力克服困难
                                                                 正确面对挫折，
                                                                 总会化蛹成蝶。