21.肝動脈插管栓塞化療術(shù)后病人一般需臥床的時間為(      )

A.6h                                                              B.12h

C.18h                                                             D.24h

22.診斷直腸癌最可靠的方法是(      )

A.大便隱血試驗                                             B.直腸指檢

C.內(nèi)鏡檢查                                                    D.X線鋇劑灌腸

23.對診斷腸梗阻有很大價值的檢查是(      )

A.血常規(guī)                                                       B.血清電解質(zhì)

C.X線檢查                                                    D.B超

24.應(yīng)激性潰瘍常見的首發(fā)表現(xiàn)是(      )

A.出血                                                           B.腹痛

C.穿孔                                                           D.嘔吐

25.甲狀腺大部切除術(shù)后病人出現(xiàn)聲音嘶啞，提示手術(shù)可能損傷了(      )

A.喉上神經(jīng)外支                                             B.雙側(cè)喉返神經(jīng)

C.喉上神經(jīng)內(nèi)支                                             D.一側(cè)喉返神經(jīng)