pdfhighlight.js

var i = getPageNumWords();
for (var p = 0; p < i; p++) {
  var word = getPageNthWord(0, p, false);
  console.println(word);
  if (word == "通" && getPageNthWord(0, p - 1, false) == "沟") {
    var annot = this.addAnnot({
      page: 0,
      type: "Highlight",
      author: "A. C. Robat",
      point: [300, 400],
      strokeColor: color.yellow,
      contents: "Need a little help with this paragraph.",
      noteIcon: "Help",
      quads: getPageNthWordQuads(0, p),
    });
  }
}