  We establish blow-up profiles for any blowing-up sequence of solutions of
general conformally invariant fully nonlinear elliptic equations on Euclidean
domains. We prove that (i) the distance between blow-up points is bounded from
below by a universal positive number, (ii) the solutions are very close to a
single standard bubble in a universal positive distance around each blow-up
point, and (iii) the heights of these bubbles are comparable by a universal
factor. As an application of this result, we establish a quantitative Liouville
theorem.
