不到30岁就成了faculty physician？

几岁就上小学？通常美国住院医毕业时都30了。

https://www.quora.com/How-old-is-the-average-MD-do-graduate#:~:text=High%20school%20graduation%20at%20age%2018.&text=4years%20of%20medical%20school%20means,you%20are%20at%20least%2030.