to put a lot of effort into doing sth, especially when this seems extreme :
She goes to extraordinary lengths to keep her private life private.
to put a lot of effort into doing sth, especially when this seems extreme :
She goes to extraordinary lengths to keep her private life private.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005