某男，急性淋巴细胞白血病缓解后突然出现头痛不适，测脑压220mmH₂O，脑脊液蛋白增高，涂片可见幼稚淋巴细胞。鞘内给药选用下列哪项（）

A.地塞米松+柔红霉素

B.地塞米松+米托蒽醌

C.地塞米松+长春新碱

D.地塞米松+甲氨蝶呤

E.地塞米松+环磷酰胺

大量无色的单一纤维，常完整并具窄管腔（）

A．Bundles of partially lignified fibres with crystal sheaths

B．Numerous colourless single fibres, often whole with narrow lumen

C．Parenchymatous cells，fibres，and vessels

D．Starch granules present，fibres and sclereids absent

E．Fibres with crystal sheath containing calcium oxalate prisms