R语言用ggsurvplot画图，如何使ylab的标签离y轴近一些？好像默认和risk table的左边对齐了。。

我的代码：


a<-ggsurvplot(fit,
       pval="p<0.001", pval.size=3,conf.int = F,censor=F,
       xlab="Time(months)",
       risk.table = TRUE,  
       table.title="F",
       linetype = c(1,1),
       surv.median.line = "hv",
       xaxs = "i",
       yaxs = "i",
       ylab="Overall survival（%）",
       xlim=c(0,72),
       axes.offset=FALSE,
       break.time.by=12,
       legend.title = "",
       palette = c("blue", "red"),
       risk.tbale.y.col="T",
       legend = c(0.8,0.9),
       legend.labs = c("Chemoradiotherapy", "Chemotherapy"),
       risk.tbale.title=F, 
       tables.theme = theme_cleantable())

图如下：

img