R 在绘图仪图表中添加悬停文字或文字注释

我们可以在

曲线图中添加悬停文字或文字注释吗？例如，在我下面的图中，我想在绿色区域中添加悬停或文本，或同时在灰色区域中添加“摄入第一剂量%：19.8”

，以及在灰色区域中添加“未接种（%）：80.2”

library（plotly）
无花果
library(plotly)

fig <- plot_ly(
  type = "indicator",
  mode = "gauge+number+delta",
  value = 19.8,
  title = list(text = "Uptake first dose %", font = list(size = 24)),
  delta = list(reference = 70, increasing = list(color = "gray")),
  gauge = list(
    axis = list(range = list(NULL, 100), tickwidth = 1, tickcolor = "lightgreen"),
    bar = list(color = "lightgreen"),
    bgcolor = "white",
    borderwidth = 2,
    bordercolor = "gray",
    steps = list(
      list(range = c(0, 50), color = "lightgreen"),
      list(range = c(20, 100), color = "gray")),
    threshold = list(
      line = list(color = "black", width = 4),
      thickness = 0.75,
      value = 70))) 
fig <- fig %>%
  layout(
    margin = list(l=20,r=30),
    paper_bgcolor = "lavender",
    font = list(color = "darkblue", family = "Arial"))

fig