如何把excel数据批量转为stata数据

local files: dir "." file "*.xlsx", respectcase
foreach file in `files' {
import excel using "`file'", describe
   forvalues i = 1/`r(N_worksheet)' {
      import excel using "`file'",    sheet("`r(worksheet_`i')'")    ///
      cellrange(`r(range_`i')')     firstrow  clear
save `file'.dta, replace
  }  
}