【名词&注释】
体外受精(in vitro fertilization)、同源人工授精(artificial insemination by husband)、异源人工授精(artificial insemination by donor)、脊柱血管瘤(vertebral hemangioma)、无性生殖(asexual reproduction)
[单选题]脊柱血管瘤多见于:( )
A. 上颈椎 B. 下颈椎 C. 胸椎 D. 腰椎 E. 骶椎