说明：  不同于其它指南，mpi-guide-fortran以mpi在fortran中的使用为核心，并给出了丰富的mpi子程序示例，以便于编程过程中灵活调用。
(Different from other guidelines, MPI guide FORTRAN takes the use of MPI in FORTRAN as the core, and gives a wealth of examples of MPI subroutines, so as to facilitate flexible call in the process of programming.)