To keep healthy,not only to their ownlifeobligations,but also torelatives,evenisthe obligation of the society. Nothing on earthgains comparable tohealth.To be healthy. 保持健康，不仅是对自己生命的义务，也是对亲属，甚至也药悼是对社会的义务。柴苦 在地球上没有什么收获比得上健称纪灿康。要健康哟。