A: Ease up about your grade! It will not be the end of the world even if you get a B.
B: But I had thought I could get A in this subject.
ease up ( on someone or something )
exp. To reduce the pressure or urgency placed on a person, thing, action, or situation. （缓和，放松，减轻）
e.g. Would you ease up already? I know I messed up the account and I don't need you berating me for it further.
e.g. Ease up on Samantha, she's under a lot of pressure at home.
He gave me a prescription and advised me to ease up on work.
e.g. It's time for your father to ease up on his work a bit for he' s getting old.
e.g. The situation should ease up now that the two sides are prepared to talk.