a sparing use of sugar的用法和样例：
- Doctors now advise only sparing use of such creams.
- The doctor advised him against the use of sugar.
- In case of diabetes, physicians advise against the use of sugar.
- Dr.Mirmirani cautions sparing use of these products, however, because they are very harsh to your hair fiber.
- A toll is charged for the use of the expressway.