Backquote simplification

[Hans Aberg]

Is it possible to simplify the backquote construct `(,x_1 ... ,x_k)  
(always unquote on all arguments) somehow, so that the unquote does  
not need to appear multiple times (depending on k)? (I construct these  
in the C-interface, and it would simplify not having to remove a  
sequence of them.)

Specifically, in
  (define g (lambda (x . y) `(,x . ,y)))
then evaluations like (g 1 2 3), (g 1 2 . (3 4)) work.

So I would want something like
  (define g (lambda (x . y) (b x . y))))
where (b x . y) might be any expression where the unquote does not  
need to appear on every variable. Only combinations line
  (define g (lambda (x . y) (b `(,x . ,y))))
seem to work.

  Hans