用readline模块,怎么实现读到某一行就不再继续读下去了？ 刚接触node,请大家帮忙看下,万分感谢!

var fs = require('fs'); //var filename = process.argv[2]; var filename = 'test.txt'; //var filename = __filename; var rl = require('readline').createInterface({ input: fs.createReadStream(filename), terminal: false });

var i = 0 ; rl.on('line', function(line){ console.log('Line: ' + line); i++; if(i===4){ console.log('here'); rl.pause();//怎么不起作用 //process.exit(0); } });