be delighted 后可加介词with、to、at、by.
补充:
be delighted with sb/sth.喜欢,合意,中意:
be delighted to do sth 很高兴做某事 ; 高兴做某事
be delighted at 因…而高兴(或欣喜)
be delighted by 很高兴通过。
be delighted to
My parents will be delighted to see you.
我父母见到你会很高兴.
be delighted with
He was delighted with the results.
他对这个结果感到满意.