老年高血压指的动脉血压升高超过（）A收缩压≥mmHg和或舒张压≥mmHgB收缩压≥mmHg和或舒张压≥mmHgC收缩压≥mmHg和或舒张压≥mmHgD收缩压≥mmHg和或舒张压≥mmHg