绿卡索要推荐信：这是据信吗？

summer0815

教授这样回的：

I would ordinarily love to help, but I am currently on parental leave and unable to work at a normal pace. Is it possible for you to find someone else to write you a letter?
Best wishes,

请教这种情况我还要继续坚持吗？
谢谢大家！