Comments: 10 pages, 8 figures, v2: a few minor changes, v3: minor changes, v4: minor changes, v5: minor changes, v6: minor changes, v7: minor changes, v8: minor changes
In the present paper, we investigate the invariance of the $\epsilon$-term in the Schwarzschild-de Sitter (SY) model. An important result obtained is that the $\epsilon$-term is invariant under the $\epsilon$-term and not subject to any possible quantum corrections.