单项选择题

The big UK grocery retailer TESCO is testing a database which knows when you like to shop, what’s on the list and how much you are likely to spend. It also knows that three-quarters of a store’s total profits comes from its top 10% of customers.
Data mining—the intensive analysis of statistics—is being combined with micro-marketing—the targeting of small groups of consumers—to cause big changes in the way we spend. The U. S. retailer Wal-Mart now mails out to customers personalised weekly shopping lists with prices, together with a list of little temptations for their taste, budget and stage in life.
These developments may have profound effects on the way we bank as well on the way we shop. In perhaps six months a customer will be able to arrive at a supermarket, pick up a bar code reader and wander about the shop, clicking on to whatever he or she wants to buy that week. A member of staff will take the bar code reader, use it to deliver the goods from the warehouse, while the customer goes off for a coffee or to have their hair clone.
A 3D body scanner will come into use within a few years. A customer who stands partially clothed in a small room for about 10 seconds, can have his physical stature mapped to an accuracy of 1 millimeter. Then he or she can shop from home, with a television remote control device, flicking through the latest catalogue of offerings from a retailer.
Fancy that outfit for yourself A click of the button, and there you are, on the television screen, wearing it. Like to see it in another color Click. Just got to have it Another click to call up the Internet banking connection, and you have bought and paid for it, and a courier will deliver tomorrow.
The revolution does not stop there. Mr. Treleaven, an expert in artificial intelligence and so- called neural networks, can tie together your current preferences, sprinkle with a little knowledge of how you are likely to age and predict your spending patterns for the rest of your life.
Is it too intrusive—an invasion of privacy "In fact just the opposite," says Mr. Treleaven. "People welcome the chance to be given valuable assistance in some of the humdrum chores of our time, and avoid being targeted by the irritations of intrusive advertising. The store owner will become the friend who gives valuable information to you.
The new method of marketing adopted by TESCO and Wal-Mart concentrates mainly on ______.