下面摘一段移民局网站的欢迎词：

Citizenship

The United States has a long history of welcoming immigrants from all parts of the world. America values the contributions of immigrants who continue to enrich this country and preserve its legacy as a land of freedom and opportunity.

Deciding to become a U.S. citizen is one of the most important decisions in an individual’s life. If you decide to apply to become a U.S. citizen, you will be showing your commitment to the United States and your loyalty to its Constitution. In return, you are rewarded with all the rights and privileges that are part of U.S. citizenship.