Hi Daitong, I'm a 4th yr FC content editor (252 on Step 1, 253 on Step 2). I would recommend flagging all topics, including ones in the anatomy sub-subject, within a organ system (e.g., Pulmonology) as you learn the material in your classes. When you do your first review of the questions just answer any questions as a "5" if you feel like they are low-yield. When you are in your MSK block, I recommend using the Anatomy subject, especially if you never had a dedicated anatomy course, and flag all topics and prune any ones you feel are low-yield by giving them a "5". As a content editor and 4th yr medical student, I highly recommend doing every FC question at least once. It will be worth the few seconds to at least read the material even if you don't give yourself the time to actually answer the question. In addition, some of that nitty-gritty is good to review every once in a while since it has a tendency to come up randomly when you're in your clinical rotations (i.e., when pimped by an attending). Every piece of content is there for a reason, and we are constantly tweaking the topics to fit the right balance of high-yield and low-yield. Let me know if you have any additional questions!