<prompt> An old woman is required to receive 4 cycles of cancer chemotherapy. After her first cycle, she developed chemotherapy-induced thrombocytopenia. Then in the next cycle, it would be appropriate to give this patient :Darbepoetin alphaFilgrastim G-CSFIron dextranOprelvekin IL-11  <response>: Oprelvekin acts like megakaryocyte colony stimulating factor and can be used to treat and prevent chemotherapy-induced thrombocytopenia.Filgrastim G-CSF and sargramostim GM-CSF are used to prevent leucopenia. 