diff --git a/bugfix_1000.py b/bugfix_1000.py
new file mode 100644
index 000000000..107722a86
--- /dev/null
+++ b/bugfix_1000.py
@@ -0,0 +1,30 @@
+# Bug Fix for Issue #1000
+import re
+from typing import Optional, Tuple
+
+
+def validate_input(input_data: str) -> Tuple[bool, str]:
+    if not input_data:
+        return False, "Input cannot be empty"
+    if len(input_data) > 1000:
+        return False, "Input too long"
+    return True, "OK"
+
+
+def sanitize_output(output_data: str) -> str:
+    if not output_data:
+        return ""
+    # 移除XSS风险字符
+    dangerous = ['<script', 'javascript:', 'onerror=', 'onload=']
+    for d in dangerous:
+        if d.lower() in output_data.lower():
+            output_data = re.sub(d, '', output_data, flags=re.IGNORECASE)
+    return output_data.strip()
+
+
+# 测试
+assert validate_input("test")[0]
+assert validate_input("")[0] == False
+assert sanitize_output("test") == "test"
+assert "<script" not in sanitize_output("test<script>")
+print("Bug fix tests passed!")