Actually, he did take some more detailed checks and mostly B超 for major organs. It turns out they are fine.
I also asked some other people here and they said during regualr check those tests like CA50 are not taken in America and one of the most important reasons is just as you, 566, Lao Dao said that it puts too much unncessary pressure on the testants if the result turns to be "abnormal". Most of the time, it doesn't really indicate much.
Again, thanks very much for your help and I really appreciate it. I have taken your email address too. Looking forward to seeing you more often here.
BTW, have you joined FNFL?