The prevalence of melanoma(黑素瘤)has been rapidly rising around the world for nearly a century. While some of the increase may be due to better detection, researchers also believe it's because we're spending more time outdoors in the sun, vacationing to warmer climates during the winter and using tanning beds. That rise is concerning, since melanoma is the most dangerous kind of skin cancer.
Most of us know to cover up and apply sunscreen on hot, sunny days, but when fall arrives, we tend to drop those habits. Experts warn that's a mistake. Though there's less need for sun protection after summer ends, exposure to UV rays still adds up.
What precautions you should take to defend against melanoma during the cooler months depends on where you are in the world. That's because the further away you are from the equator, the more UV rays weaken in the winter. "In southern England or Canada,the daily dose of UVA on a clear summer day is 6.5 times higher than on a clear winter day," says Professor Brian Diffey of the British Association of Dermatologists. "People in those countries typically receive only about 5% of their annual UV exposure in the winter months."
But no matter where you are, even during colder, lower risk months, it's a mistake to put your sun-protection habits on ice. "It's important to wear sun-screen when there is a lot of glare from the snow," says Victoria Mar, director of the Victorian Melanoma Service at Alfred Hospital in Melbourne, Australia.
Finally, you should monitor your moles(痣). "Early detection of melanoma is vital for successful treatment," says Diffey. If it's caught before it spreads to other parts of the body, the patient will have 99% of chance to survive for five years. If it's caught late,that can drop to 25%. Warning signs are a mole that's changing size, shape or colour, or one that's asymmetrical-sometimes referred to as "ugly duckling" moles. If you have concerns, talk to your doctor.
What's the main cause of the rise of melanoma? ______
A. The climate change.
B. Better detection.
C. More exposure to the sun.
D. The increase of skin cancer.
What's a mistake according to experts? ______
A. Applying sunscreen in summer.
B. Wearing sun-screen when there is snow.
C. Using sunscreen during lower risk months.
D. Dropping sun-protection habits in winter.
What can we learn from the last paragraph? ______
A. Prevention is better than cure.
B. Health is better than wealth.
C. A disease known is half cured.
D. When the sun comes in, the doctor comes out.
What is the best title of the text? ______
A. Detect Melanoma.
B. Beware Winter Rays.
C. Monitor Your Moles.
D. Spend Less Time Outdoors.