拒绝了一个已经签字的offer, 这样对你有很大影响

-- You gain experience of how to reject an offer;

-- You know you are lucky not working for a bad manager;

-- You have better life style;

-- In the future, you can tell 不土的书生: you shoose what is z best for U and Ur family.

-- 如此影响，能小吗？

-- 放宽心，Enjoy! Even you start work, you can quit. Nothong to worry about.