在R中控制饼图标签的间隙？

# 创建一个饼图
data <- c(10, 20, 30, 40)
labels <- c("A", "B", "C", "D")
colors <- c("red", "blue", "green", "yellow")
pie(data, labels = labels, col = colors)

# 调整标签的大小
pie(data, labels = labels, col = colors, cex = 0.8)

# 调整标签的位置
pie(data, labels = labels, col = colors, cex = 0.8, pos = 2)

# 调整标签与饼图之间的连线类型
pie(data, labels = labels, col = colors, cex = 0.8, pos = 2, lty = "dashed")