摘自前面链接中的FAQ,看来没交问题不大: If you departed by a commercial air or sea carrier (airlines or cruise ships ), your departure from the U.S. can be independently verified, and it is not necessary to take any further action, although holding on to your outbound (from the U.S.) boarding pass - if you still have it - can help facilitate your reentry next time you come back to the United States.
【在 x*x 的大作中提到】 : 摘自前面链接中的FAQ,看来没交问题不大: : If you departed by a commercial air or sea carrier (airlines or cruise ships : ), your departure from the U.S. can be independently verified, and it is not : necessary to take any further action, although holding on to your outbound : (from the U.S.) boarding pass - if you still have it - can help facilitate : your reentry next time you come back to the United States.