45. 有關 Difficult colonoscopy，下列敘述何者有錯誤？

(A) Failed caecal intubation with a conventional adult colonoscope is reported
in up to 5% to 20% of colonoscopies

(B) Difficult colonoscopy 多由 colon 的 tortuous segment 引起

(C) Difficult caecal intubation 可用 pediatric colonoscope 來幫忙

(D) Double balloon endoscopy 可用來幫忙困難大腸鏡檢查

(E) 通常困難大腸鏡檢查，最常見 looping 是發生在 hepatic flexure colon 附近

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