【答案解析】Some important features and trends in world economic development merit our close attention. They include: rapid progress in science and technology, which substantially increases man's ability to understand and grasp the world at both the macro and micro levels and gives him a powerful support to boost production and improve well-being; quickened tempo in the optimization and reorganization of the factors of production and the industrial transfers in the global context, which results in closer economic connections among countries and more favorable conditions for their mutually beneficial cooperation.// At the same time, owing to historical and immediate causes, unevenness in worldwide development has become increasingly salient, with the heavily indebted developing countries facing a worsened external environment and the gap between the South and the North further widening. New trade barriers and protectionism are on the increase, and the world's multilateral trading regime is experiencing difficulties. The consumption of energy and other natural resources has increased substantially, resulting in ecological imbalances and environmental degradation. Factors of uncertainty and instability, such as local conflicts and terrorism, pose increasing threat to world peace and development.// In a word, mankind is faced with both grave challenges and rare opportunities for development. Given the circumstances, the only right option for us to take is cooperation geared to a win-win result, and the only goal for us to endeavor towards is sustainable development. Our own experience with development tells us that every country must go through an evolving process that today's development is the continuation of that of yesterday and the groundwork of that of tomorrow.//