完形填空 Researchers stress that we need diet and exercise to drop pounds. "The most 【26】 way to lose weight is with a combination," says Rena Wing, head of the National Weight Control Center. 【27】 experts also admit that many 【28】 losers find it helps to 【29】 on one or the other. "A lot of people feel helpless at the thought of 【30】 everything — diet, lifestyle," says Bess Marcus, professor of human behavior at Brown University Medical School. "So ask yourself, ''【31】 do I want to start? What am I willing to focus on?'' " The 【32】 depends on everything from what you hope to 【33】 to how your life is 【34】. If you are in a big hurry to drop pounds 【35】, dieting is the way to go. Decades of 【36】 have shown it''s the surest and quickest method. If you are more 【37】 with how you look than with numbers on the scale, though, 【38】 may be the way to go. By increasing physical activity, you''ll 【39】 fat and build muscle tissue. 【40】 often end up losing both fat and muscle tissue. Your 【41】 approach is one that suits your lifestyle. If you''ve tried and 【42】 at one approach, consider the other. " A lot of people have become so disappointed that they begin to think they''ll 【43】 be able to lose weight, " says Marcus. "That''s when it''s time to try something new. 【44】 a small step forward can help people 【45】 confidence and convince themselves they can make even bigger changes."