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+Another day spent digging into Khan Academy. I finished Get Ready For
+Geometry. It's already late evening, and I'm feeling tired. I found out
+that Brilliant.org is a great complement to geometry classes because it
+provides visualizations, and the interactive approach really helps with
+understanding shapes. Especially when it comes to understanding where
+formulas like the area of a circle or the volume of a cone come from.
+Sal says the proof for the volume of a sphere requires Calculus, I am
+definitely looking forward to mastering it in the future.
+
+Some volume formulas:
+
+V(triangular prism)=(1/2)bhl
+V(cube)=s^3
+V(shpere)=(4/3)πr^3
+V(cone)=(1/3)hπr^2
+
+I also learned another tip: on macOS, we can type the character π with
+the shortcut option+p.
+
+---
+
+Teach Yourself Programming in Ten Years —— Peter Norvig
+https://norvig.com/21-days.html
+
+I really enjoy reading the article, and I deeply believe in deliberate
+practice. Why are people—including myself—in such a hurry? I guess it's
+because time feels limited. we can't afford to spend that long
+accomplishing a goal. The journey seems interminable, which discourages
+us, so we constantly need to feel productive. Because of that,
+fearlessness—as mentioned at the end of the article—may be a much more
+important characteristic than people realize.
+
+The other day, I came across a blogger named BoJone
+(https://spaces.ac.cn) while surfing the Internet. Some of his posts
+date back 17 years, to when he was still in junior high school. Reading
+those old posts and seeing what he eventually became is deeply inspiring
+to me, and perhaps the best example of deliberate practice. He has been
+interested in science, mathematics, and cosmology since childhood.
+Through his blog, I can clearly see the power of long-term growth.
+
+Another thing that came to mind is Teach Yourself Computer Sience
+(teachyourselfcs.com) which I have been procrastinating on for a few
+years. I should remind myself to stay patient and focus on the present
+moment. Instead of thinking about how long everything will take, I
+should simply enjoy the learning process.
+
+Back to the article, there are also many valuable ideas in it. If you
+want to master something, you need to be genuinely interested in it. The
+best kind of learning is learning by doing. I can't master programming
+or mathematics just by reading books. Read great code and learn from
+other programmers. Write maintainable code. Lead projects if you can and
+inspire others if you can.
+
+---
+
+中國控煙困局：1.4萬億人民幣如何綁架政府？
+https://theinitium.com/20241206-initium-audio-china-tobacco-monopoly/
+
+This is an old episode republished by Initium Media. I guess it was
+republished because a woman confronted a man smoking at a bus stop in
+Shenzhen this spring. The report organizes the timeline and tells the
+story of how smoking bans in China eventually failed. It's a shame to
+see how much official influence from the government and the tobacco
+industry shaped the outcome.
+
+From my personal experience, it's almost impossible to avoid second-hand
+smoke in Guangzhou or Foshan. You encounter it everywhere: walking on
+the street, waiting at traffic lights, in restrooms, in sports stadiums,
+in parks, and even while dining at fancy restaurants. What concerns me
+most when taking trains between cities is not the distance to the
+railway station or whether the trail will be delayed, but the groups of
+people smoking on the platform. It's disgusting, it drives me crazy, and
+there is almost nothing I can do about it.
+
+In daily life, whenever possible, I try my best to avoid the rush hour.
+After all, people are often the most unpredictable factor.