It examines in detail the disparities in each period, describes the efforts and achievements that took place up to 2005 and the new challenges that must be met in order to improve the life of the population.
它详细考察了各个阶段间的差别，描述了截至2005年以前的努力和成就，以及为了改善全体国民生活所必需应对的各项新挑战。