可否遞交申請，然後回國，等收到打指紋的通知再去？
-Yes.
一共可以申請幾次白皮書？
-No limit, but USCIS may not approve your RP renewal application continually unless you can justify it.
這樣連續申請白皮書是否會對將來入籍有影響？
-If you stay outside US for more than 6 months, your physical presence continuity for the US citizenship will be disrupted and have to be recounted when you come back and live in US.
