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+好的，现在开始编写 `ResultFruits` 的渲染器
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+<<<<<<<<<< "我们将在此处编写渲染器代码"
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] <<<<<<<<<< "和 #[chain] 类似，渲染器函数叫 #[renderer]"
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits( <<<<<<<<<< "编写函数体"
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits <<<<<<<<<< "声明接收 ResultFruits 类型"
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {} <<<<<<<<<< "一般情况下，渲染器什么都不用返回"
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    <<<<<<<<<< "接下来在此处编写渲染逻辑"
+} 
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = <<<<<<<<<< "首先我们先解包 ResultFruits"
+} 
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = <<<<<<<<<< "pack! 宏会自动为 ResultFruits 实现 AsRef trait"
+} 
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = result.as_ref(); <<<<<<<<<< "所以此处可以使用 as_ref()"
+} 
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = &*result; <<<<<<<<<< "当然，deref 也可以解包 ResultFruits"
+} 
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = &*result; 
+    for fruit in vec { <<<<<<<<<< "接下来，循环遍历 ResultFruits 中的水果字符串"
+} 
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = &*result; 
+    for fruit in vec {
+        <<<<<<<<<< "在循环中打印内容"
+    }
+}
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = &*result; 
+    for fruit in vec {
+        r_println!("{}", fruit) <<<<<<<<<< "使用 r_println 在循环中打印内容"
+    }
+}
+ 
+gen_program!();  
+```
+ 
+---
+
+```rust
+use mingling::prelude::*; <<<<<<<<<< "r_println! 由 prelude 提供"
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer] 
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = &*result; 
+    for fruit in vec {
+        r_println!("{}", fruit)
+    }
+}
+ 
+gen_program!();  
+```
+ 
+---
+
+至此 `ResultFruits` 的渲染逻辑便已完成
+
+```rust
+use mingling::prelude::*;
+ 
+pack!(ResultFruits = Vec<String>);
+ 
+#[chain]
+fn handle_entry_list(_prev: EntryList) -> Next {
+    // ...
+}
+ 
+#[renderer]
+fn render_fruits(result: ResultFruits) {
+    let vec: &Vec<String> = &*result; 
+    for fruit in vec {
+        r_println!("{}", fruit)
+    }
+}
+ 
+gen_program!();  
+```