By STEPHEN BLOOM Burma’s President Thein Sein gave his first interview to a member of the foreign media this week when he answered a wide range of questions from Lally Weymouth, senior associate editor for The Washington Post , which touched on most of the top issues currently being discussed about Burma. In the interview, published in The Washington Post on Friday, Thein Sein proved to be a skillful politician, diplomat and negotiator, as he repeatedly pressed the main talking points he wanted to communicate to his international audience and deftly sidestepped issues that are problematic for his government. Thein Sein said that peace, stability and economic development were the goals of his government’s reform measures, and used the pulpit provided by a leading US newspaper to make his case for the lifting of US and EU sanctions. “. . . the US and the EU have had economic sanctions on our country. It has been [for] nearly 20 years now. I would like to see them ease . . . and