女性,42岁,乏力、面色苍白、尿色黄1年。重度贫血貌,巩膜轻度黄染,肝、脾肋下未触 及。血清总胆红素27μmol/L,非结合胆红素19μmol/L,肝功能正常。尿潜血(+++)。血红蛋白55g/L,白细胞3.5×109/L,平均红细胞体积70fl,血小板72×109/L。骨髓象:中幼+晚幼红细胞66%,网织红细胞9%。 最可能的诊断是
A. 缺铁性贫血
B. 溶血性贫血
C. 巨幼细胞性贫血
D. 骨髓增生异常综合征
Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. What does the speaker say the term stadium refers to
A place for making astronomical observations.
B. An instrument used for observing stars.
C. A unit of measurement.
D. The North Star.