他坚持要立刻退款，不接受任何延迟。

He is ___insisting on an immediate refund and won't accept any delays.

尽管证据显示相反，她仍然坚持说自己没有迟到。

Despite evidence to the contrary, she kept ___insisting that she wasn't late.

尽管医生建议休息，他坚持要继续工作。

Despite the doctor's advice to rest, he is ___insisting on continuing to work.