中文：

美国控制油价的原因主要有以下几点：

首先，石油对于全球经济具有至关重要的作用。美国作为全球最大的经济体之一，控制油价可以维护其自身利益，并确保国内经济的稳定发展。

其次，石油是全球最重要的战略资源之一。美国通过控制油价，可以影响其他国家的经济和政治局势，从而实现其外交政策目标。

此外，美国还是全球最大的石油生产国之一，其石油产量占全球总产量的很大一部分。因此，美国政府通过控制国内油价，可以维护本国石油企业的利益，并确保国内石油市场的稳定。

最后，美国控制油价还可以防止石油供应中断或短缺的情况发生。美国政府可以通过调整油价来确保石油供应的稳定，以满足国内市场的需求。

总的来说，美国控制油价是为了维护自身利益、确保国内经济稳定、影响其他国家的经济和政治局势、维护本国石油企业的利益以及防止石油供应中断或短缺的情况发生。

英文：The reasons why the United States controls oil prices are as follows:

Firstly, oil plays a crucial role in the global economy. As one of the largest economies in the world, the United States can maintain its own interests and ensure the stable development of the domestic economy by controlling oil prices.

Secondly, oil is one of the most important strategic resources in the world. By controlling oil prices, the United States can influence the economic and political situations of other countries, thus achieving its foreign policy goals.

In addition, the United States is also one of the largest oil-producing countries in the world, with its oil production accounting for a large portion of the global total. Therefore, the U.S. government can maintain the interests of domestic oil companies and ensure the stability of the domestic oil market by controlling domestic oil prices.

Finally, controlling oil prices can also prevent situations of oil supply interruption or shortage. The U.S. government can ensure stable oil supply to meet domestic market demand by adjusting oil prices.

In general, the United States controls oil prices to maintain its own interests, ensure the stable development of the domestic economy, influence the economic and political situations of other countries, maintain the interests of domestic oil companies, and prevent situations of oil supply interruption or shortage.