It can be inferred that Phyllis's trip to England with Nathaniel in 1773 ______

A．did not improve her health

B．was for business reasons

C．led to books of her poems being available in America

D．led to the publication of her poems because the English were more interested in religious and moral subjects

益气渗湿法的代表方是____；益气升阳法的代表方是____。