【单选题】
抗肿瘤药物引起骨髓抑制，需要使用G-CSF的指征为（）。
①
<img class="kfformula" src="20200409/1586408980792681.png" data-latex="WBC0.3\times {10}^{9}/L"/>
②
<img class="kfformula" src="20200409/1586408980958257.png" data-latex="WBC0.5\times {10}^{9}/L"/>
③
<img class="kfformula" src="20200409/1586408980748148.png" data-latex="WBC1.5\times {10}^{9}/L"/>
④
<img class="kfformula" src="20200409/1586408980915317.png" data-latex="WBC2.0\times {10}^{9}/L"/>
⑤
<img class="kfformula" src="20200409/1586408980925185.png" data-latex="WBC1.0\times {10}^{9}/L"/>