Section BDirections: Read the following passage carefully and answer the questions accordi

Section B
Directions: Read the following passage carefully and answer the questions according to the information given in the passage and the required words limit. Write your answer on your answer sheet.
Every woman worries about the day when she glimpses the first wrinkle (皱纹) in her otherwise smooth skin. But for many, that day is arriving even earlier than they expected.
Sun and cigarettes in adolescence and early adulthood are the sinner (罪魁祸首) behind age spots, broken blood vessels and irregular pigmentation (色素沉着) by the time you’re in your 30’s. Avoiding those two is the best way to keep skin look young as long as possible. But if damage is done, don’t lose hope. You can take advantage of a lot of skin-care products.
What can you expect from these and other skin-care products? Here’s some advice from the experts:
Sunblock
It seems obvious, but dermatologists (皮肤科医生) say many people still wrongly assume that sun protection is required only for a day at pool or beach. In fact, you need it every day. Wonder what your skin would like if you’d kept it protected from the sun? “Look at your butt (臀部),” says Dr. Steven Cohen, chief of the dermatology department at Montefiore Medical Center in New York. “It’s smooth, without wrinkle.”
Spot removers
To specifically target “sun spots” and even out skin color, dermatologists remend products with hydroquinone (氢醌；对苯二酚), which gradually whitens the skin. Side effects include redness and irritation. Avoid these products if you’re pregnant because they can hurt a developing fetus (胎儿).
One more point: you’re never too late to protect your skin. You may feel like giving up when you see the consequences of teenage tans (dark color spot) in your mirror, but that’s no excuse for skipping daily sunblock. Sun damage is accumulative—and that means every day’s rays do a little more harm. So keep on doing it, and you may get a big surprise after ten or more years.   
81. What do the underlined words “those two” in Paragraph Two refer to? (No more than 3 words)
    
82. How should a pregnant woman deal with skin-care products? (No more than 3 words)
    
83. Why does the author use the example of “Look at your butt”? (No more than 11 words)
    
84. What is the main idea of the passage? (No more than 13 words)
    81. Sun and cigarettes. （2分）