摘要：According to the "1989–91 USDA Survey of Food Intakes," older American adultsconsume much more coffee than younger ones, while the opposite is the case with pop (soda)(Table 1). In forecasting consumption of coffee and pop in the future, as the US populationages as a whole, there can be two extremely different projections. One is that those in theirtwenties and thirties in the 1980s might consume much more coffee and much less pop asthey reach their forties and fifties, resulting in a substantial increase and decrease, respec-tively, in consumption of coffee and pop (as a nation). The other possibility is that thoseyounger adults in the 1980s might retain their consumption habits for soft drinks as they getolder, resulting in drastic decreases and increases, respectively, in consumption of coffee andpop (Rentz & Reynolds, 1991).
