same as the book?

I agree, after i red the book i've actually noticed quite a few differences, inspite of the many voices which state ( justified up to a point) that the film renders the book faithfully, but i would add faithfully but with some liberties. To put it more precisely, in the book it is not Gerald's sister which marries in the beginning that eventually drowns, it is another sister and she drowns not toghtter with her husband but with a local doctor, in quite different circumstances: she actually drowns the doctor and then dies either by accident during the struggle that took place while choking him or by suicide. Secondly, in the book the drowning and the wrestling scene are placed at a fairly importnant distance between each other, unlike the film where one simply follows the other, but here i can partly understand Russell's intetion to connect these two in order to make the transition from the dead bodies to the living, energetic and sexually active bodies more dramatic, even the number of the protagonists these scenes being, on both occasions, two. Third, Gerald is described blond in the book, while Oliver Reed is dark-haired, fourth the winter holiday takes place in Innsbruck, not in Zermatt like in the film. Now i know thet a screenplay is allowed to have certain inaccuracies and that it might focus less on exact renditions of a book, i still don't know why Russell could overook this details, as i doubt that he wouldn't have the talent, the allround knowledge, the staff or the vision to get these detaills sorted out more accurately.