a stubborn illness的用法和样例：
- I had a stubborn cold and coughed day and night.
- There is no reasoning with such a stubborn man as Peter.
- The child has a stubborn temper.
- I have a stubborn cold and cough day and night.
- You might as well talk to a stone as try to argue with a stubborn woman.
- Really, Johnny! If ever there was a stubborn idiot, you're a prime example.