单项选择题

Time spent in bookshop can be most enjoyable, whether you are a book lover or merely there to buy a book as a present. Whatever the person, you can soon become totally unaware of your surroundings. You soon become engaged in some books, and usually it is only much later that you realize you have spent far too much time there and must dash off to keep some forgotten appointment — without buying a book, of course. This opportunity to escape the realities of everyday life is, I think, the main attraction of a bookshop. A music shop is very like a bookshop. You can wander round such places to your heart’’s content. If it is a good shop, no assistant will approach you with the inevitable greeting: "Can I help you, sir" You needn’’t buy anything you don’’t want. In a bookshop, an assistant should remain in the background until you have finished browsing (浏览) . Then, and only then, are his services necessary. You have to be careful not to be attracted by the variety of books in a bookshop. It is very easy to enter the shop looking for a book on ancient coins and to come out carrying a copy of the latest best-selling novel and perhaps a book about brass-rubbing — something which had only vaguely interested you up until then. This volume on the subject, however, happened to be so well illustrated and the part of the text you read proved so interesting that you just had to buy it. This sort of thing can be very dangerous. Apart from running up a huge account, you can waste a great deal of time wandering from section to section. Booksellers must be both long-suffering and indulgent (宽容) for customers of any type, especially for those who just come to browse or even read. However, it should be put as the priority of a bookshop that the best of its customers are those who love books. According to the writer, the best way to escape the realities of routine life is_____.