Dear XXX & YYY, (just put their names, for foreigners, they won't use "appellation" (稱謂))
How are you doing? Is everything fine? Take care of yourselves.
Wish you good health, a great success in study and business.
(I think it's not the practice in English to write express wishes in this way, I think just one is enough)
Dear XX, XX (put their name)
How are you guys doing lately?Busy? Please take care.
I wish you to have good health, great success at work and at school this year.
Older female cousin, younger male cousin: Your most recent well-being? Busy? ? Must please the careful body! Wishes you: Health! ! ! The studies are progressive! ! Business good! !
How are you? Are you busy recently? Please beware of your bodies.
wish,
Have a healthy body!
Have a improvement in your studies!
Successful in businesses.
Best wishes,
XXX
2006-12-15 20:47:47 補充:
Usually there will not be so many Qs in a letter. And after "Please beware of your bodies", there should be sth talk about why.