diff --git a/q4-1.py b/q4-1.py
index dbd889b..5911af7 100644
--- a/q4-1.py
+++ b/q4-1.py
@@ -25,4 +25,8 @@ plt.tight_layout()  # 防止文字重叠
 
 # 保存图片 dpi=150
 plt.savefig("q4_1_bar.png", dpi=150)
-plt.show()
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+plt.show()
+
+打开 VS Code，顶部菜单栏点击 终端 (Terminal) → 新建终端 (New Terminal)
+在底部弹出的终端窗口输入安装命令，回车执行
+pip install matplotlib
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