diff --git a/examples/rust.ipynb b/examples/rust.ipynb
index cae1c32..dbf8a52 100644
--- a/examples/rust.ipynb
+++ b/examples/rust.ipynb
@@ -46,11 +46,11 @@
     " * @param n 所求数字\n",
     " * @returns 斐波那契数\n",
     " */\n",
-    "fn fib(n: i32) -> i32 {\n",
+    "fn fib(n: usize) -> usize {\n",
     "    if n < 2 {\n",
-    "        return n;\n",
+    "        n\n",
     "    } else {\n",
-    "        return fib(n - 1) + fib(n - 2);\n",
+    "        fib(n - 1) + fib(n - 2)\n",
     "    }\n",
     "}"
    ]
@@ -77,19 +77,16 @@
     " * @param n 所求数字\n",
     " * @returns 斐波那契数\n",
     " */\n",
-    "fn fib_DP(n:i32) -> i32{\n",
-    "    // 构建线性序列\n",
-    "    // 初始化数组 & 设置初态\n",
-    "    let mut arr: Vec<i32> = vec![0, 1];\n",
+    "fn fib_DP(n: usize) -> usize {\n",
+    "    // 构建线性序列 & 初始化数组 & 设置初态\n",
+    "    let mut arr: Vec<usize> = vec![0, 1];\n",
     "    // 设置状态转移方程\n",
-    "    let i: usize; // 只需声明类型，后续在循环中初始化\n",
-    "    let n: usize = n as usize;\n",
     "    for i in 2..(n+1) {\n",
     "        // 状态转移：fib(i>2) => fib(i-1) + fib(i-2)\n",
-    "        arr.push(arr[i - 1] + arr[i - 2]);\n",
+    "        arr.push(arr[i-1] + arr[i-2]);\n",
     "    }\n",
     "    // 返回最终结果\n",
-    "    return arr[n]\n",
+    "    arr[n]\n",
     "}"
    ]
   },
@@ -102,7 +99,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 33,
+   "execution_count": 4,
    "metadata": {
     "vscode": {
      "languageId": "rust"
@@ -114,9 +111,15 @@
      "output_type": "stream",
      "text": [
       "[0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986]\n",
-      "递归方法: 0.5693288 s\n",
+      "递归方法: 0.8210494 s\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
       "[0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986]\n",
-      "动态规划: 0.0000222 s\n"
+      "动态规划: 0.0000837 s\n"
      ]
     }
    ],
@@ -126,17 +129,19 @@
     "use std::time::Instant;\n",
     "use std::time::Duration;\n",
     "\n",
-    "/** 简单的数组打印函数 */\n",
-    "fn println_vec(v: Vec<i32>) {\n",
-    "\tlet i: usize;\n",
-    "\tprint!(\"[\");\n",
-    "\tfor i in 0..v.len() {\n",
-    "\t\tif i != 0 {\n",
-    "\t\t\tprint!(\", \");\n",
-    "\t\t}\n",
-    "\t\tprint!(\"{}\", v[i])\n",
+    "/**\n",
+    " * 根据函数和长度，生成一个指定长度的向量\n",
+    " * @template T 要生成的向量的类型\n",
+    " * @param f 函数\n",
+    " * @param len 长度\n",
+    " * @return Vec<T> 长度为len、内部元素为`v[i] = f(i)`的向量\n",
+    " */\n",
+    "fn generate_vec<T>(f: fn(usize) -> T, len: usize) -> Vec<T> {\n",
+    "\tlet mut v = Vec::new();\n",
+    "\tfor i in 0..len {\n",
+    "\t\tv.push(f(i));\n",
     "\t}\n",
-    "\tprintln!(\"]\");\n",
+    "\tv\n",
     "}\n",
     "\n",
     "/** 打印时间函数 */   \n",
@@ -149,19 +154,16 @@
     "\n",
     "/** 定义主函数，允许后续编译成可执行文件 */\n",
     "fn main() {\n",
-    "\tconst N: i32 = 40;\n",
+    "\tconst N: usize = 40;\n",
     "\n",
     "\tlet t: Instant = Instant::now();\n",
-    "\tlet mut arr: Vec<i32> = vec![];\n",
-    "\tfor i in 0..N { arr.push(fib(i)); }\n",
-    "\tprintln_vec(arr);\n",
+    "\tlet arr: Vec<usize> = generate_vec(fib, N);\n",
+    "\tprintln!(\"{arr:?}\");\n",
     "\tprintln_duration_sec(\"递归方法\", t.elapsed());\n",
     "\t\n",
     "\tlet t: Instant = Instant::now();\n",
-    "\tlet mut arr: Vec<i32> = vec![];\n",
-    "\t// arr.clear();\n",
-    "\tfor i in 0..N { arr.push(fib_DP(i)); }\n",
-    "\tprintln_vec(arr);\n",
+    "\tlet arr: Vec<usize> = generate_vec(fib_DP, N);\n",
+    "\tprintln!(\"{arr:?}\");\n",
     "\tprintln_duration_sec(\"动态规划\", t.elapsed());\n",
     "}\n",
     "// %ignore-below\n",