Four-dimensional(4D) spacetime structures are investigated using the concept
of the geodesic distance in the simplicial quantum gravity. On the analogy of
the loop length distribution in 2D case, the scaling relations of the boundary
volume distribution in 4D are discussed in various coupling regions i.e.
strong-coupling phase, critical point and weak-coupling phase. In each phase
the different scaling relations are found.Comment: 4 pages, latex, 4 ps figures, uses espcrc2.sty. Talk presented at
LATTICE96(gravity). All figures and its captions have been improve