a buying spree的用法和样例：
- He then went on a buying spree abroad, chiefly in Eastern Europe.
- Continuously rising gold prices have sparked a buying spree among individual investors throughout China this year.
- Regulators and bankers have carefully studied Japan's experience in the 1980s, when the country's corporations went on a buying spree in the west, overextending themselves.
- A sell order has similar steps as a buy order.