diff --git a/examples/01.basic.php b/examples/01.basic.php
index 0d32143..2745cc0 100644
--- a/examples/01.basic.php
+++ b/examples/01.basic.php
@@ -25,8 +25,8 @@
     ->setMessageHandler(function (QueueMessage $message, Worker $worker) {
         // 模拟正常处理逻辑
         usleep(1000);
-        })
-        ->registerSignal(SIGINT, function () {
+    })
+    ->registerSignal(SIGINT, function () {
         // Ctrl+C会向前端进程组发送SIGINT信号,我们不希望worker也被这个信号影响,而是希望由dispatcher来控制它的生存周期
     })
     ->registerEvent('error', function (string $reason, \Throwable $e, Worker $worker) {
diff --git a/examples/04.prefetch.php b/examples/04.prefetch.php
index a82d88d..48b5bbe 100644
--- a/examples/04.prefetch.php
+++ b/examples/04.prefetch.php
@@ -33,7 +33,7 @@
 
 $params = require __DIR__.'/amqp_params.php';
 $conn = new Connection($params['connectionOptions'], $params['queues']);
-// !!!!!!!!!!就是这里!!!!!!!!!!!!
+// 使用该方法设置prefetch值
 $conn->setPrefetch(10);
 
 $dispatcher = (new Dispatcher($conn, $factory))