  Neutrino-dominated accretion flows (NDAFs) around rotating stellar-mass black
holes are plausible candidates for the central engines of gamma-ray bursts
(GRBs). We investigate one-dimensional global solutions of NDAFs, taking
account of general relativity in Kerr metric, neutrino physics and
nucleosynthesis more precisely than previous works. We calculate sixteen
solutions with different characterized accretion rates and black hole spins to
exhibit the radial distributions of various physical properties in NDAFs.
\iffalse We find that the gas pressure and the neutrino cooling always become
dominated in the inner region for large accretion rate, $\gtrsim 0.1 M_\odot$
$\rm s^{-1}$. \fi We confirm that the electron degeneracy has important effects
in NDAFs and we find that the electron fraction is about 0.46 in the outer
region for all the sixteen solutions. From the perspective of the mass
fraction, free nucleons, $\rm ^4He$, and $\rm ^{56}Fe$ dominate in the inner,
middle, and outer region, respectively. The influence of neutrino trapping on
the annihilation is of importance for the superhigh accretion ($\dot
M=10M_{\odot} \rm s^{-1}$) and most of the sixteen solutions have an adequate
annihilation luminosity for GRBs.
