I think what you do is nurture and encourage. She's verbal and picks up things quickly so nurture it. Lots of story books, lots of library, lots of phonics, puzzles, building games, painting, drawing, play doh, running, skipping, singing, dancing, chatting, petting farms, park, etc., etc.. Just keep her interested and motivated and encourage a love of life and a love of learning. Most of all love her.
If you do all of that she will fulfil all the natural talent she has (and make sure you send her to the best possible schools that you can).
I had a very alert, very verbal baby boy who seemed streets ahead of the others. We knew when he was barely weeks old that he was bright - it was in the eyes. We just nurtured him. He is at Oxford now studying a very academic subject.
I also had a bright baby girl but even in the earliest days we could tell she wasn't quite as bright. Certainly bright and certainly doing all your daughter is doing and an A grade student who might just slither into Oxford.
Was it nature, nurture or rising to expectation - probably a bit of all three but even if they had ended up in the lower sets at school we would have made sure they could be the best they possibly could be and would have had lives as joyous and enriching as we could have made them.
At the end of the day all we can do is set boundaries for our children, love them and keep them safe. If we do all that they are likely to grow up to be happy and rounded adults and that is all we should ever want for them.
But, good luck, because I well recall that it can be exhausting keeping up with an uber bright child or a child who is brighter than you expected. By the time ds went to bed my mouth used to hurt from answering his questions non stop throughout the day. It can still hurt when he's home and argues black is white
. Parenting is a constant challenge and a challenge that never seems to go away. WELCOME.