1.protect yourself from the sun
The most important way to take care of your skin is to protect it from the sun.Ultraviolet light-the invisible but intense rays from the sun——damages your skincausing deep wrinkles，dry，rough skin，liver spots，and more serious disorders，such as noncancerous（非癌的）（benign良性的）and cancerous（癌的）（malignant恶性的）skin tumors（肿瘤）.In fact，most of the changes seen in aging skin are actually caused by a lifetime of sun exposure.
For the most complete sun protection，use all three of these methods：
Avoid the sun during high-intensity hours.The sun's rays are most damaging from 10 a.m.to 4 P.m.Reduce the time you spend out doom during these hours.Wear protective clothing.Cover your skin with clothing，such as long·sleeved shirts，long pants and wide-brimmed hats.Also，keep in mind that certain clothingstyles and fabrics offer better protection from the sun than do others.For example，long-sleeved shirts offer better protection than short-sleeved shirts do.And tightlywoven fabrics such as denim are better than are loosely woven fabrics such as knit.Several companies now make Sun Protective Clothing（SPF Clothing），which is spe-cifically designed to block-out.rultraviolet rays while keeping you cool and comfortable.Use sunscreen.Choose a broad·spectrum sunscreen with a Sun Protection Fac.tor（SPF）greater than 15.Apply liberally 20 minutes before going outdoors and re-apply every two hours，after heavy sweating or after being in water.……
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