<html>
<head>
<meta charset="utf-8">
<title>第一个程序 Hello World</title>
</head>
<body>
<p></p>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script>
var p = d3.select("body").selectAll("p").text("Hello World");
//修改段落的颜色和字体大小
p.style("color", "red").style("font-size", "72px");
</script>
</body>
</html>