我是NIW，最近收到485RFE.信中要求：
“submit a letter and/or other documentary evidence which establishes that you will continue to be engaged in the occupation of which the NIW is based. This evidence shall specify how you intend to serve the national interest and confirm that you intend to carry out the terms and conditions of the underlying I_140 petition."
请高人指点如何证明我将来会继续从事NIW相关工作？ 仅仅emloyment letter 就够吗？我感觉这封信不能specify how you intend to serve the national interest。 写个personal career plan 或cover letter 会有帮助吗？多谢！