護理師教導個案大腸癌篩檢。下列何者敘述正確？
A nurse is educating a client about colon cancer screening. Which information is accurate?
- AScreening is only necessary if there are symptoms只有在出現症狀時才需要篩檢
- BStool tests can replace the need for colonoscopy forever糞便檢測可以永遠取代大腸鏡檢查的需求
- CColonoscopy is the only way to screen for colon cancer大腸鏡是篩檢大腸癌的唯一方法
- DScreening should begin at age 45 for average-risk adults✓ 正解一般風險成人應從 45 歲開始篩檢
大腸癌篩檢策略已調整，最新指引建議一般風險者從 45 歲開始。篩檢旨在無症狀時期發現息肉或癌變。大腸鏡（colonoscopy）是篩檢與診斷的金標準，但非唯一選項，糞便潛血測試（FIT/gFOBT）也是有效的篩檢工具。若篩檢結果異常，必須進一步安排大腸鏡檢查，因此篩檢不是一次性的，而是需要定期進行。
Colon cancer screening strategies have been updated, and current guidelines recommend that average-risk adults begin screening at age 45. Screening aims to detect polyps or malignant changes during the asymptomatic phase. Colonoscopy is the gold standard for screening and diagnosis, but it is not the only option; stool-based tests (FIT/gFOBT) are also effective screening tools. If screening results are abnormal, a follow-up colonoscopy must be arranged; therefore, screening is not a one-time event but must be performed at regular intervals.