概述
現代人生活節奏越來越快，因此，方便、快捷的快餐深受人們的“喜愛”。然而，快餐多為油炸食品，主要由肉類產品以及高糖、高油的甜食組成，缺乏蔬菜、水果和纖維質，因此也被稱為“垃圾食品”。人們若長期食用這種垃圾食品會導致營養失衡，甚至引發嚴重的疾病。與之相反，均衡飲食使人體內攝入充足的營養物質，因此能夠使人更健康。我們要在生活中減少垃圾食品的攝入量，注重均衡飲食，這樣才能保持身心健康，從而更好地工作和生活。
一、寫作思路 首段：首先說明現在的一種社會現象：在現代社會，很多人難以抵禦誘人的垃圾食物，對其的攝入量過大。然後說明過量吃垃圾食品對人的健康的危害，由此引出均衡飲食很重要的觀點。
中段：分兩個方麵進行分析。首先，可以描述垃圾食品將會導致的嚴重後果，如體重增加、會使心髒和其他身體器官負荷過重、導致精神疾病等，繼而影響到人們正常的學習、工作和生活。接下來，說明均衡飲食的好處，比如可以使人體攝入充足的營養，保持良好的精神狀態和身體狀態。
末段：總結全文，倡導人們要保持飲食均衡。
二、參考範文和譯文 參考範文
Say Goodbye to Junk Foods
In modern society, few are immune to the advertising of many types of pretty, delicious junk foods, but overconsumption of junk foods can not only add pounds that you'd like to get rid of, but can have negative consequences to health.
For one thing, over-consumption of junk foods like potato chips, pizza or fast food can lead to a boost in weight and eventually obesity, which can also mean extra weight on your heart and other bodily organs. For another, bad dieting habits combined with a lack of regular exercise can even contribute to mental illness, since physical dysfunction always affects people mentally. This combination can lead to poor performance in study and work. On the contrary, a balanced diet can contribute to adequate nutrition for you, so that you can be healthy and have a good mental state.