A.堅持隨機化抽樣，減少漏查，統(tǒng)一檢測標準，校準儀器，加強調(diào)查的監(jiān)督和質(zhì)控
B.堅持多個醫(yī)院選擇病例，減少漏查，統(tǒng)一檢測標準，加強調(diào)查的監(jiān)督和質(zhì)控
C.堅持隨機化抽樣，減少不依從，暴露測量標準應(yīng)統(tǒng)一，加強調(diào)查的監(jiān)督和質(zhì)控
D.堅持隨機化抽樣，盡量用新發(fā)病例，暴露測量標準應(yīng)統(tǒng)一，加強調(diào)查的監(jiān)督和質(zhì)控
E.堅持隨機化分組，減少不依從，統(tǒng)一檢測標準，加強調(diào)查的監(jiān)督和質(zhì)控