a well-thumbed book的用法和样例：
- A well devoid of water is useless.
- The oil workers are sinking a well.
- An encyclopedia is a well of knowledge.
- It is a better book to dip into than to read from cover to cover.
- Here is an old-fashioned pump for drawing water from a well.
- I can't call my book a best seller as such but it's very popular.