prefer to do 还是doing? i prefer to sleep\sleeping?

prefer to do 还是doing? i prefer to sleep\sleeping?

prefer to do sth. 强调特定的或某次具体的动作，即在一定的场合下宁愿做什么。
prefer doing sth. 强调一般性倾向，即对某种行为的“偏爱”。

eg. I prefer to sleep (at the moment). 这个时间我宁愿睡觉（而不是做其他事）。
I prefer sleeping (on Sunday mornings). 周日早上我喜欢睡觉。

【补充】
① prefer to do A rather than B
② prefer (doing) A to (doing) B

请达人给详细解释一下，为什么前面是to do而后面是doing.为什么前后不一致。I prefer to read books rather than swim. 意思是我喜欢读书 不喜欢游泳

prefer to do A rather than do B 宁愿做A这件事而不愿做B这件事I prefer to swim rather than run
prefer doing A to doing B 喜欢做A胜于做B这里的TO不是不定式I prefer swimming to running
prefer to do sth 更喜欢做某事I prefer to swim
prefer A to B 喜欢A胜于B I prefer apples than pears