自古以来人们根据经验就已经知道日光是身体健康必不可少的因素。我国唐朝著名医学家孙思邈所著《千金要方》中说“凡天和暖无风之时,令母将儿领日中嬉戏,数见风日则血凝气刚,肌肉牢密,堪耐风寒,而不致疾病。若常藏在帏帐之中,重衣温暖,譬犹阴地之草木,不见风日,软脆不堪风寒也。”这里与现代医著所说日光可以促进人体的新陈 Since ancient times, people have learned from experience that sunlight is an essential factor for good health. The famous doctor of the Tang Dynasty, Sun Ssu-ch’ang, wrote in The daughter to party that when the sky is warm and the wind is warm, the mother and the child lead the day to play. Cold-tolerant, but not disease .If often hidden in the draperies, heavy coat warm, such as the stillness of the vegetation, not the wind, soft and cold also. "Here and modern medicine said sunlight can promote the human body New