diff --git a/gee-cache/day1-lru/geecache/lru/lru.go b/gee-cache/day1-lru/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day1-lru/geecache/lru/lru.go
+++ b/gee-cache/day1-lru/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/day2-single-node/geecache/lru/lru.go b/gee-cache/day2-single-node/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day2-single-node/geecache/lru/lru.go
+++ b/gee-cache/day2-single-node/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/day3-http-server/geecache/lru/lru.go b/gee-cache/day3-http-server/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day3-http-server/geecache/lru/lru.go
+++ b/gee-cache/day3-http-server/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/day4-consistent-hash/geecache/lru/lru.go b/gee-cache/day4-consistent-hash/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day4-consistent-hash/geecache/lru/lru.go
+++ b/gee-cache/day4-consistent-hash/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/day5-multi-nodes/geecache/lru/lru.go b/gee-cache/day5-multi-nodes/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day5-multi-nodes/geecache/lru/lru.go
+++ b/gee-cache/day5-multi-nodes/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/day6-single-flight/geecache/lru/lru.go b/gee-cache/day6-single-flight/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day6-single-flight/geecache/lru/lru.go
+++ b/gee-cache/day6-single-flight/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/day7-proto-buf/geecache/lru/lru.go b/gee-cache/day7-proto-buf/geecache/lru/lru.go
index 6fa617a..dc1a317 100644
--- a/gee-cache/day7-proto-buf/geecache/lru/lru.go
+++ b/gee-cache/day7-proto-buf/geecache/lru/lru.go
@@ -39,12 +39,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-cache/doc/geecache-day1.md b/gee-cache/doc/geecache-day1.md
index 064d90a..2f096d9 100644
--- a/gee-cache/doc/geecache-day1.md
+++ b/gee-cache/doc/geecache-day1.md
@@ -155,12 +155,11 @@ func (c *Cache) Add(key string, value Value) {
 		kv := ele.Value.(*entry)
 		c.nbytes += int64(value.Len()) - int64(kv.value.Len())
 		kv.value = value
-		return
+	} else {
+		ele := c.ll.PushFront(&entry{key, value})
+		c.cache[key] = ele
+		c.nbytes += int64(len(key)) + int64(value.Len())
 	}
-	ele := c.ll.PushFront(&entry{key, value})
-	c.cache[key] = ele
-	c.nbytes += int64(len(key)) + int64(value.Len())
-
 	for c.maxBytes != 0 && c.maxBytes < c.nbytes {
 		c.RemoveOldest()
 	}
diff --git a/gee-orm/day7-migrate/geeorm.go b/gee-orm/day7-migrate/geeorm.go
index 017d116..f9bbcd8 100644
--- a/gee-orm/day7-migrate/geeorm.go
+++ b/gee-orm/day7-migrate/geeorm.go
@@ -106,7 +106,7 @@ func (engine *Engine) Migrate(value interface{}) error {
 
 		for _, col := range addCols {
 			f := table.GetField(col)
-			sqlStr := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s;", table.Name, f.Name, f.Tag)
+			sqlStr := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s;", table.Name, f.Name, f.Type)
 			if _, err = s.Raw(sqlStr).Exec(); err != nil {
 				return
 			}
diff --git a/gee-orm/doc/geeorm-day7.md b/gee-orm/doc/geeorm-day7.md
index 44079fd..7e6dc1c 100644
--- a/gee-orm/doc/geeorm-day7.md
+++ b/gee-orm/doc/geeorm-day7.md
@@ -89,7 +89,7 @@ func (engine *Engine) Migrate(value interface{}) error {
 
 		for _, col := range addCols {
 			f := table.GetField(col)
-			sqlStr := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s;", table.Name, f.Name, f.Tag)
+			sqlStr := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s;", table.Name, f.Name, f.Type)
 			if _, err = s.Raw(sqlStr).Exec(); err != nil {
 				return
 			}
diff --git a/gee-web/doc/gee-day3.md b/gee-web/doc/gee-day3.md
index 4b34f6d..0d66e54 100644
--- a/gee-web/doc/gee-day3.md
+++ b/gee-web/doc/gee-day3.md
@@ -18,7 +18,7 @@ github: https://github.com/geektutu/7days-golang
 
 本文是 [7天用Go从零实现Web框架Gee教程系列](https://geektutu.com/post/gee.html)的第三篇。
 
-- 使用 Tire 树实现动态路由(dynamic route)解析。
+- 使用 Trie 树实现动态路由(dynamic route)解析。
 - 支持两种模式`:name`和`*filepath`，**代码约150行**。
 
 ## Trie 树简介