What should she do to give a birthday present to her quarrelling friend?

Giving birthday presents is a sign of courtesy and gratitude, but if there is a contradiction or quarrel between friends, you can consider expressing your blessings and apologies in other ways.

After a dispute or quarrel between friends, exchanging birthday gifts may be misunderstood by the other party as perfunctory and ironic, thus further deepening the contradiction and estrangement. Therefore, in this case, you can express your blessings and apologies in other ways, such as sending a sincere letter of apology to the other party, or calling or texting the other party to express your blessings and apologies. If friends are still unwilling to accept gifts, they can respect each other's wishes and not force them to accept gifts. The key is to take a positive attitude, show your sincerity and goodwill, communicate with each other, and try to resolve conflicts, so as to rebuild friendship.

In daily life, contradictions and differences will inevitably arise between people, and how to deal with them properly is a problem worth learning and discussing. When dealing with the contradictions between friends, we should face them rationally, patiently and kindly, and try our best to reduce contradictions and misunderstandings.