And of course, you can mix and match these caching strategies within the same graph. One node might be entirely trivial to calculate, and not worth caching at all, while another might require the most heavy-duty caching you can get your hands on. Some nodes might need to always be up-to-date, but maybe others can take a stale-while-revalidate approach (being wary of glitches in that case!). ↩︎
and the places where they’re accessed are fixed,。新收录的资料对此有专业解读
，详情可参考PDF资料
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李海市：所谓的“体育运动两小时”，不是指孩子放学、下课后的闲暇时间。学生下课上厕所、和同学聊聊天、散散步，是休息，而不是运动。落实两小时，一个很重要的抓手是要有高质量的比赛，既可以在体育课上开展，也可以在课间、课外进行，必须全员参与。同时，也可以提倡体育游戏，哪怕是我们小时候玩的老鹰捉小鸡，真正玩起来，运动量也是很大的。，详情可参考新收录的资料