【名词&注释】
上颌第一前磨牙(maxillary first premolar)、牙萌出(tooth eruption)、牙周膜厚度(thickness of periodontal ligament)、治疗高血压(treatment of hypertensive)
[单选题]拔牙患者,血压高于多少时,应先治疗高血压(treatment of hypertensive)
A. ≥18.6/12kPa
B. ≥21.3/12.7kpa
C. ≥24.0/13.3kPa
D. ≥26.7/16.0kPa
E. ≥33.8/15.6kPa