【正确答案】[范文]
   Healthy lifestyle is a concept raised by scientists, which means a kind of regular life to maintain physical and psychological well-being. Though it will benefit people, it's not easy for everyone to stick to it.
   There're two reasons why most people lead an unhealthy lifestyle. The first is the laziness in human being's nature. For many people, they never stand when they can sit, and they prefer the five minutes' drive to work to cycling. The second is the faster living tempo, which puts more pressure on everyone. Even though people are aware that they are living an unhealthy lifestyle, working pressure forces them to eat more and never exercise, sleep late and less.
   To reduce the undesirable effects brought by the unhealthy lifestyle, solutions are needed for individuals and society as a whole. Firstly, various media should popularize and advocate the concept of a healthy lifestyle, encouraging people from all walks of life to take part in outdoor activities or sports, for example. Furthermore, in order to reduce stress in big cities, one metropolitan should be separated into several smaller communities. Meanwhile, people's living environment should be more convenient, where traffic jams are released and close relationship with neighbors brings easy and happy atmosphere.
   In conclusion, human's natural desire and fast pace living tempo drive people to ignore healthy lifestyles. Deconstructing the urban construction would be a desirable direction to ameliorate the situation.