Using a preposition:The way of her keeping health is to jog every day.
【正确答案】正确答案：she keeps her health by jogging every day．
【答案解析】解析：译文：她保持健康的方法就是每天慢跑。by意为“通过……”，表方式、方法。介词后应用动词一ing形式，动词jog的一ing形式为jogging。