diff --git a/README.md b/README.md
index ee47fe6..a6036b4 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,16 @@
 ``` golang
 pq := pqueuekey.New(compare.Int)
 pq.Push(1, 1)
-pq.Push(2, 2)
-v = pq.Pop() // v = 2
+pq.Push(4, 4)
+pq.Push(5, 5)
+pq.Push(6, 6)
+pq.Push(2, 2)        // pq.Values() = [6 5 4 2 1]
+value, _ := pq.Pop() // value = 6
+t.Error(value)
+value, _ = pq.Get(1)        // value = 1 pq.Values() = [5 4 2 1]
+value, _ = pq.Get(0)        // value = nil , Get equal to Seach Key
+value, _ = pq.Index(0)      // value = 5, compare.Int the order from big to small
+values := pq.GetRange(2, 5) // values = [2 4 5]
+values = pq.GetRange(5, 2)  // values = [5 4 2]
+values3 := pq.GetAround(5) //  values3 = [<nil>, 5, 4]
 ```
diff --git a/priority_queue/priority_queue_test.go b/priority_queue/priority_queue_test.go
index dd8abd3..c3bf3f5 100644
--- a/priority_queue/priority_queue_test.go
+++ b/priority_queue/priority_queue_test.go
@@ -122,32 +122,32 @@ func TestQueueGetAround(t *testing.T) {
 
 	var result string
 	result = spew.Sprint(pq.GetAround(53))
-	if result != "[32 53 78]" {
+	if result != "[78 53 32]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(52))
-	if result != "[32 <nil> 53]" {
+	if result != "[53 <nil> 32]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(1))
-	if result != "[<nil> 1 4]" {
+	if result != "[4 1 <nil>]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(90))
-	if result != "[78 90 <nil>]" {
+	if result != "[<nil> 90 78]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(0))
-	if result != "[<nil> <nil> 1]" {
+	if result != "[1 <nil> <nil>]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(100))
-	if result != "[90 <nil> <nil>]" {
+	if result != "[<nil> <nil> 90]" {
 		t.Error(result)
 	}
 }
diff --git a/priority_queue/vbt.go b/priority_queue/vbt.go
index 0a116df..e0c96eb 100644
--- a/priority_queue/vbt.go
+++ b/priority_queue/vbt.go
@@ -273,7 +273,7 @@ func (tree *vbTree) GetRange(k1, k2 interface{}) (result []interface{}) {
 			return []interface{}{}
 		}
 
-		result = make([]interface{}, 0, 16)
+		result = make([]interface{}, 0, 8)
 
 		// iter := NewIterator(min)
 		tree.iter.SeNode(min)
@@ -300,7 +300,7 @@ func (tree *vbTree) GetRange(k1, k2 interface{}) (result []interface{}) {
 			return []interface{}{}
 		}
 
-		result = make([]interface{}, 0, 16)
+		result = make([]interface{}, 0, 8)
 
 		// iter := NewIterator(max)
 		tree.iter.SeNode(max)
@@ -329,11 +329,12 @@ func (tree *vbTree) Get(key interface{}) (interface{}, bool) {
 	return n, false
 }
 
+// GetAround 改成Big To Small
 func (tree *vbTree) GetAround(key interface{}) (result [3]interface{}) {
 	an := tree.getArounNode(key)
 	for i, n := range an {
 		if n != nil {
-			result[i] = n.value
+			result[2-i] = n.value
 		}
 	}
 	return
diff --git a/priority_queue/vbt_test.go b/priority_queue/vbt_test.go
index af2e593..970f5f2 100644
--- a/priority_queue/vbt_test.go
+++ b/priority_queue/vbt_test.go
@@ -93,56 +93,56 @@ func TestGetAround(t *testing.T) {
 	var Result string
 
 	Result = spew.Sprint(tree.GetAround(17))
-	if Result != "[16 17 20]" {
+	if Result != "[20 17 16]" {
 		t.Error(tree.Values())
 		t.Error("17 is root, tree.GetAround(17)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(3))
-	if Result != "[<nil> 3 7]" {
+	if Result != "[7 3 <nil>]" {
 		t.Error(tree.Values())
 		t.Error("tree.GetAround(3)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(40))
-	if Result != "[30 40 40]" {
+	if Result != "[40 40 30]" {
 		t.Error(tree.Values())
 		t.Error("tree.GetAround(40)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(50))
-	if Result != "[40 50 <nil>]" {
+	if Result != "[<nil> 50 40]" {
 		t.Error(tree.Values())
 		t.Error("tree.GetAround(50)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(18))
-	if Result != "[17 <nil> 20]" {
+	if Result != "[20 <nil> 17]" {
 		t.Error(tree.Values())
 		t.Error("18 is not in list, tree.GetAround(18)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(5))
-	if Result != "[3 <nil> 7]" {
+	if Result != "[7 <nil> 3]" {
 		t.Error(tree.Values())
 		t.Error("5 is not in list, tree.GetAround(5)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(2))
-	if Result != "[<nil> <nil> 3]" {
+	if Result != "[3 <nil> <nil>]" {
 		t.Error(tree.Values())
 		t.Error("2 is not in list, tree.GetAround(2)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(100))
-	if Result != "[50 <nil> <nil>]" {
+	if Result != "[<nil> <nil> 50]" {
 		t.Error(tree.Values())
 		t.Error("50 is not in list, tree.GetAround(50)) is error", Result)
 		t.Error(tree.debugString())
diff --git a/priority_queuekey/priority_queuekey_test.go b/priority_queuekey/priority_queuekey_test.go
index 8a242b5..f91d378 100644
--- a/priority_queuekey/priority_queuekey_test.go
+++ b/priority_queuekey/priority_queuekey_test.go
@@ -122,32 +122,32 @@ func TestQueueGetAround(t *testing.T) {
 
 	var result string
 	result = spew.Sprint(pq.GetAround(53))
-	if result != "[32 53 78]" {
+	if result != "[78 53 32]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(52))
-	if result != "[32 <nil> 53]" {
+	if result != "[53 <nil> 32]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(1))
-	if result != "[<nil> 1 4]" {
+	if result != "[4 1 <nil>]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(90))
-	if result != "[78 90 <nil>]" {
+	if result != "[<nil> 90 78]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(0))
-	if result != "[<nil> <nil> 1]" {
+	if result != "[1 <nil> <nil>]" {
 		t.Error(result)
 	}
 
 	result = spew.Sprint(pq.GetAround(100))
-	if result != "[90 <nil> <nil>]" {
+	if result != "[<nil> <nil> 90]" {
 		t.Error(result)
 	}
 }
diff --git a/priority_queuekey/vbt.go b/priority_queuekey/vbt.go
index 802be1c..70cc6c7 100644
--- a/priority_queuekey/vbt.go
+++ b/priority_queuekey/vbt.go
@@ -273,7 +273,7 @@ func (tree *vbTree) GetRange(k1, k2 interface{}) (result []interface{}) {
 			return []interface{}{}
 		}
 
-		result = make([]interface{}, 0, 16)
+		result = make([]interface{}, 0, 8)
 
 		// iter := NewIterator(min)
 		tree.iter.SeNode(min)
@@ -300,7 +300,7 @@ func (tree *vbTree) GetRange(k1, k2 interface{}) (result []interface{}) {
 			return []interface{}{}
 		}
 
-		result = make([]interface{}, 0, 16)
+		result = make([]interface{}, 0, 8)
 
 		// iter := NewIterator(max)
 		tree.iter.SeNode(max)
@@ -333,7 +333,7 @@ func (tree *vbTree) GetAround(key interface{}) (result [3]interface{}) {
 	an := tree.getArounNode(key)
 	for i, n := range an {
 		if n != nil {
-			result[i] = n.value
+			result[2-i] = n.value
 		}
 	}
 	return
diff --git a/priority_queuekey/vbt_test.go b/priority_queuekey/vbt_test.go
index 4c8f671..a1bdcda 100644
--- a/priority_queuekey/vbt_test.go
+++ b/priority_queuekey/vbt_test.go
@@ -93,56 +93,56 @@ func TestGetAround(t *testing.T) {
 	var Result string
 
 	Result = spew.Sprint(tree.GetAround(17))
-	if Result != "[16 17 20]" {
+	if Result != "[20 17 16]" {
 		t.Error(tree.Values())
 		t.Error("17 is root, tree.GetAround(17)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(3))
-	if Result != "[<nil> 3 7]" {
+	if Result != "[7 3 <nil>]" {
 		t.Error(tree.Values())
 		t.Error("tree.GetAround(3)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(40))
-	if Result != "[30 40 40]" {
+	if Result != "[40 40 30]" {
 		t.Error(tree.Values())
 		t.Error("tree.GetAround(40)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(50))
-	if Result != "[40 50 <nil>]" {
+	if Result != "[<nil> 50 40]" {
 		t.Error(tree.Values())
 		t.Error("tree.GetAround(50)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(18))
-	if Result != "[17 <nil> 20]" {
+	if Result != "[20 <nil> 17]" {
 		t.Error(tree.Values())
 		t.Error("18 is not in list, tree.GetAround(18)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(5))
-	if Result != "[3 <nil> 7]" {
+	if Result != "[7 <nil> 3]" {
 		t.Error(tree.Values())
 		t.Error("5 is not in list, tree.GetAround(5)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(2))
-	if Result != "[<nil> <nil> 3]" {
+	if Result != "[3 <nil> <nil>]" {
 		t.Error(tree.Values())
 		t.Error("2 is not in list, tree.GetAround(2)) is error", Result)
 		t.Error(tree.debugString())
 	}
 
 	Result = spew.Sprint(tree.GetAround(100))
-	if Result != "[50 <nil> <nil>]" {
+	if Result != "[<nil> <nil> 50]" {
 		t.Error(tree.Values())
 		t.Error("50 is not in list, tree.GetAround(50)) is error", Result)
 		t.Error(tree.debugString())