我正在阅读stat方法的手册here它说:Usingfs.stat()tocheckfortheexistenceofafilebeforecallingfs.open(),fs.readFile()orfs.writeFile()isnotrecommended.Instead,usercodeshouldopen/read/writethefiledirectlyandhandletheerrorraisedifthefileisnotavailable.Tocheckifafileexistswithoutmanipulatingitafterwards,fs.access()i