假设你叫李华。你叔叔是位工程师，最近病倒了。请根据下表内容给他写一封建议信，告诉他如何保持健康。
注意：1.词数：100左右 2.可适当增加细节，使行文连贯。
Dear Uncle,
                                                                       
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          
Yours,        
                        Li Hua