将[]字符串转换为[] []字节的最简洁语法？

I'd like to convert a slice of strings to a slice of slices of bytes.

I can use a for-loop to convert each string to a slice and append to the recipient slice. But I am not sure this is the most succinct way. Could anybody show me the most succinct way to convert a slice of strings to a slice of slices? Thanks.

Here is a simple example using os.Args as the input slice of string.

  var fields [][]byte
  for _, x := range os.Args[3:] {
    fields = append(fields, []byte(x))
  }