diff --git a/index.html b/index.html
index 2d84311..5706a2c 100644
--- a/index.html
+++ b/index.html
@@ -400,12 +400,23 @@ $$$('#subcategory', 'change', (e) => {
 });
 
 $$$('#chunk_size', 'change', (e) => {
-    let limit = $('#subcategory').disabled ? Limit : Number(subcategory.dataset.limit);
+    let limit = Number($('#subcategory').dataset.limit) || Limit;
     let size = Math.floor(limit / e.target.value);
 
     $('#limit').value = size;
     $('#offset').max = size;
     $('#offset').value = 0;
+    $('#offset').dispatchEvent(new Event('change'));
+});
+
+$$$('#offset', 'change', (e) => {
+    let limit = Number($('#subcategory').dataset.limit) || Limit;
+    let size = Number($('#chunk_size').value) || 0;
+
+    if ($('#slice').checked) {
+        limit = Math.min(size, limit - size * Number(e.target.value));
+    }
+    e.target.dataset.limit = limit;
 });
 
 function main(url, parameters, locales) {
@@ -523,10 +534,10 @@ function main(url, parameters, locales) {
 
         if (Status === 'RUNNING') {
             let index = Number($('#progressLabel').dataset.index) || 0;
-            let limit = Number($('#subcategory').dataset.limit) || Limit;
+            let limit = Number($('#offset').dataset.limit) || 0;
+
             let percentage = parseFloat((index / limit * 100).toFixed(2));
             $('#progressLabel').innerText = `${index} / ${limit} (${percentage} %)`;
-
             let uptime = Timer.getTimedelta();
             $('#uptimeLabel').innerText = uptime.format("HH:mm:ss");
 
diff --git a/main.py b/main.py
index 74a5f12..77e1dd8 100644
--- a/main.py
+++ b/main.py
@@ -10,7 +10,7 @@ import re
 import trio
 import trio_websocket as ws
 
-from selenium.common.exceptions import StaleElementReferenceException, TimeoutException
+from selenium.common.exceptions import StaleElementReferenceException, TimeoutException, InvalidSessionIdException
 from selenium.webdriver import Chrome, ChromeOptions
 from selenium.webdriver.common.action_chains import ActionChains
 from selenium.webdriver.common.by import By
@@ -22,7 +22,7 @@ from selenium.webdriver.remote.webdriver import WebDriver
 
 from io import BytesIO
 from enum import Enum
-from queue import Queue, Empty
+from queue import Queue, Empty, ShutDown
 from wakepy import keep
 from pathlib import Path
 from datetime import datetime, timedelta
@@ -30,18 +30,18 @@ from zoneinfo import ZoneInfo
 from threading import Thread
 from nameparser import HumanName
 
-parser = argparse.ArgumentParser(description="邮件批量发送脚本")
+parser = argparse.ArgumentParser(description="Bulk Email Sending")
 parser.add_argument('url', nargs='?', default='https://id.ionos.fr/identifier')
-parser.add_argument('--column-address', type=str, nargs='?', default='邮箱')
-parser.add_argument('--column-name', type=str, nargs='?', default='主要联系人')
-parser.add_argument('--column-code', type=str, nargs='?', default='客户编号')
-parser.add_argument('--column-pays', type=str, nargs='?', default='国家地区')
-parser.add_argument('--column-sent', type=str, nargs='?', default='已发送')
-parser.add_argument('-a', '--address', type=str, nargs='?')
-parser.add_argument('-p', '--password', type=str, nargs='?')
-parser.add_argument('-t', '--timeout', type=int, nargs='?', default=60)
-parser.add_argument('-i', '--interval', type=int, nargs='?', default=10)
-parser.add_argument('-r', '--attempts', type=int, nargs='?', default=3)
+parser.add_argument('--column-address', type=str, default='邮箱')
+parser.add_argument('--column-name', type=str, default='主要联系人')
+parser.add_argument('--column-code', type=str, default='客户编号')
+parser.add_argument('--column-pays', type=str, default='国家地区')
+parser.add_argument('--column-sent', type=str, default='已发送')
+parser.add_argument('-a', '--address', type=str)
+parser.add_argument('-p', '--password', type=str)
+parser.add_argument('-t', '--timeout', type=int, default=60)
+parser.add_argument('-i', '--interval', type=int, default=10)
+parser.add_argument('-r', '--attempts', type=int, default=3)
 
 args = parser.parse_args()
 inbox, outbox = Queue(), Queue()
@@ -333,6 +333,7 @@ def main(driver: WebDriver):
         cursor = 0
         status = Status.ACTIVE
         occurrences = {}
+        request = None
         sent = 0
         errors = 0
         warnings = 0
@@ -475,8 +476,8 @@ def main(driver: WebDriver):
                         break
                 except Faillable as o:
                     request = o.request
-                except KeyboardInterrupt:
-                    tell('程序中断', level=1)
+                except (KeyboardInterrupt, ShutDown, InvalidSessionIdException) as e:
+                    tell('程序中断', e, level=1)
                     status = Status.TERMINATED
                     break
                 except Exception as e:
@@ -572,9 +573,6 @@ if __name__ == '__main__':
             opts.add_experimental_option("excludeSwitches", ["enable-logging"])
             driver = Chrome(opts)
             status = main(driver)
-    except KeyboardInterrupt:
-        tell('程序中断', level=1)
-        status = 145
     except Exception as e:
         tell('致命错误', e, level=0)
         status = 1