FIT Document(D:\7-12册封面\中文PDF\第十册主教材\10册主教材合版OK.FIT)

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Laugh and cry. Having a good sob is reputed to be good for you. So is laughter, which has been shown to help heal bodies, as well as broken hearts. Studies in Japan indicate that laughter boosts the immune system and helps the body shake off allergic reactions.
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