關於第三個問題，還是有點疑問：即我每次回美國有時大約隻待了10天左右，是否有嫌疑隻是回來保持連續有效居民期，從而在申請公民的時候被刁難？
-No problem, but you have to provide the evidences for your staying in US physically.
在遞交申請之前，是否必須在美國原來所在州連續呆（physically）3個月以上？
-Depends. If most of the time you are staying in China during the year adn then, you return to US to apply for the US citizenship, you may need to stay 3 months and then, to do that. But if you just visit China for one or two months and return to US, then you may just submit the applciation immediately.
遞交申請之後是否可以回國等通知，再來半下一步？
-Yes, but you may need to go forth and back frequently in a short period of time for the exam, fingerprinting, interview, etc.
現在大約需要多少時間？
另外，我有個14歲的女兒，和我同時取得綠卡並回國，後來她沒有能夠每半年回來一次（但每年回來一次）。如果我帶她一起申請，因為她的居住時間已經置零了，是否有問題？
-No problem. Minor child (<18) does not this requirement.
