In other offices, politeness is a superfluous rather than central part of the culture. Rather than spending your time deciphering the expectations of your interviewers, invest in making the thank you note clinch your candidacy. You should consider the content of your thank you letter as carefully as you considered the content of your cover letter. 

In addition to showing appreciation for the time of the interviewer and establishing another point of contact, your thank you letter should include a reaffirmation of your particular value to the company now that you have more information about the job. Use the note to market yourself. By referencing specific concerns and needs of the company as expressed by the interviewer, you show the interviewer again that you paid close attention to what she said.

By citing particular ways in which you can address those needs and concerns, you do the work of connecting the job requirements with your job skills. Making connections between yourself and the job not only fortifies your aptness for the position, but it also tangibly demonstrates your interest in the position. The greater care you take to customize the note, the more personally it will affect the interviewer. For this reason, it is also helpful to comment on something specific that you appreciated about the interviewer or what she said. (Note: be sure that your comments are appropriate and professional.)

If there is something important that you forgot to mention during the interview, you think there might have been a point of miscommunication, or the interviewer indicated concern over some aspect of your qualifications, you can address these in the thank you note. When doing so, be certain that your tone is positive, forthright, and confident.