  We show that one can use some renormalized coupling constants to compute the
free energy and correlation functions at all critical points of the
two-dimensional topological gravity in a uniform way. In particular, one can
derive the critical exponents of the free energy and correlation functions at
all critical points in a uniform way. Some concrete results for the case of
$(3,2)$-model (pure gravity) and the $(5,2)$-model (Yang-Lee edge singularity
coupled with gravity) are also presented.
