阳光是生命不可或缺的要素之一。晒点太阳能增强人体对钙、磷的吸收,对佝偻病、类风湿性关节炎、贫血等患者恢复健康有一定的益处。此外,阳光中的紫外线有很强的杀菌能力,一般细菌和某些病毒在阳光下晒半小时,就会被杀死。紫外线还能使人体内的脱氢胆固醇变成维生素D,促进骨的钙化和生长。不过,紫外线的过度照射会引起光致凝结,抑制人体免疫系统功能,使人反应迟钝,可诱发眼睛、皮肤、肺部方面的疾病。上世纪七十年代西方盛行的日光浴之所以未能在全世界持续流行,就是因为在日光浴的过程中,皮肤长时间遭暴晒,损害了皮肤组织,对健康 Sunshine is an essential element of life. Sun exposure to solar energy to enhance the body’s absorption of calcium and phosphorus, rickets, rheumatoid arthritis, anemia and other patients have some health benefits. In addition, the sun’s ultraviolet rays have a strong bactericidal ability, the general bacteria and some viruses in the sun for half an hour, it will be killed. Ultraviolet light can make the human body dehydrocholesterol into vitamin D, promote bone calcification and growth. However, excessive exposure to ultraviolet light can cause photocoagulation, inhibit the body’s immune system, make people unresponsive, can cause eye, skin, lung diseases. The sun in the 70s of last century the prevalence of the reason why the sun did not continue the epidemic in the world, it is because in the sunbathing process, the skin was exposed to prolonged damage to skin tissue, health