我如何promisifyredis以便我可以使用then？我已尝试向客户promise:varredis=require('redis');Promise.promisifyAll(redis.RedisClient.prototype);varclient=redis.createClient();client.on('connect',function(){console.log('Redisconnectionisup');client.lrange('abc',0,3).then(function(result){console.log(result);res.send(200