Thank you for your great advice in advance! I heard that the US visa application is freaking strict, most of all, it is very very harsh to single girls, guess the US government assumes everyone wanna get married in the US? lol
Just a little point to note, for a job interview, I reckon it is great to ask question in the end of the interview, for instance, by asking the team structure or the brief job duty if you may get the job, to show you sincerely want the job and will work industrious and serious in the future.