阅读下面的诗文，回答相关问题。

                                                                                                          《饮酒》
                                                                                                            陶渊明

                                                                                             结庐在人境，而无车马喧。
                                                                                             问君何能尔，心远地自偏。
                                                                                             采菊东篱下，悠然见南山。
                                                                                             山气日夕佳，飞鸟相与还。
                                                                                              此中有真意，欲辩已忘言。

“君子之于物也，爱之而弗仁；于民也，仁之而弗亲。亲亲而仁民，仁民而爱物”孟子这句话强调的是（    ）

李嘉图关于工资和利润关系的观点有（    ）

①工资上升，利润上升         ②工资下降，利润下降

③工资上升，利润下降         ④工资下降，利润上升

A smile costs __________, but it gives so much. So we should learn to smile.