大美也得看證；以後記得查證

Here are three key things to look for when searching for a colonoscopy doctor:

1. Gastroenterologist vs. General Physician/Surgeon
2. Board Certification
3. Physicians detection rate of pre-cancerous polyps (growths)

https://gialliance.com/gastroenterology-blog/what-to-look-for-when-selecting-a-gastroenterologist?