食补是指通过食用某些食物以增进健康，或防止疾病，尤其在人容易生病的时候。
Tonic food is food which is consumed to improve one's well-being, or stave off sickness, particularly at times when one is more prone to illness.
体育和运动可以增进人体的健康和人的乐观情绪，而乐观情绪却是长寿的一项必要条件。
Sports and exercise can improve the health of human body and man of optimism, but the optimism is a necessary condition of longevity.
医学的疆界是增进人的健康。
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