diff --git a/src/heurams/interface/screens/memorizor.py b/src/heurams/interface/screens/memorizor.py
index 4093a11..e69574a 100644
--- a/src/heurams/interface/screens/memorizor.py
+++ b/src/heurams/interface/screens/memorizor.py
@@ -18,7 +18,7 @@ class AtomState(Enum):
 class MemScreen(Screen):
     BINDINGS = [
         ("q", "pop_screen", "返回"),
-        ("p", "pop_screen", "上一个"),
+        #("p", "prev", "上一个"),
         ("d", "toggle_dark", "改变色调"),
         ("v", "play_voice", "朗读"),
     ]
@@ -29,30 +29,35 @@ class MemScreen(Screen):
     def __init__(self, atoms: list, name: str | None = None, id: str | None = None, classes: str | None = None) -> None:
         super().__init__(name, id, classes)
         self.atoms = atoms
-        #print(atoms)
         self.phaser = Phaser(atoms)
+        #print(self.phaser.state)
         self.procession: Procession = self.phaser.current_procession() # type: ignore
+        #print(self.phaser.state)
 
     def current_widget(self):
-        self.fission = Fission(self.procession.current_atom, self.phaser.state)
-        puzzle_info = next(self.fission.generate())
-        print(puzzle_info)
-        return shim.puzzle2widget[puzzle_info["puzzle"]](atom = self.procession.current_atom, alia = puzzle_info["alia"])
+        try:
+            self.fission = Fission(self.procession.current_atom, self.phaser.state)
+            puzzle_info = next(self.fission.generate())
+            print(puzzle_info)
+            return shim.puzzle2widget[puzzle_info["puzzle"]](atom = self.procession.current_atom, alia = puzzle_info["alia"])
+        except (KeyError, StopIteration, AttributeError) as e:
+            print(f"Fission error: {e}")
+            return Static("无法生成谜题")
         #print(shim.puzzle2widget[puzzle_info["puzzle"]])
 
     def compose(self) -> ComposeResult:
         yield Header(show_clock=True)
         with Center():
             yield Static(f"当前进度: {self.procession.process()}/{self.procession.total_length()}")
-        #self.mount(self.current_widget()) # type: ignore
-        yield Button("重新学习此单元", id="re-recognize", variant="warning")
+        self.mount(self.current_widget()) # type: ignore
+        #yield Button("重新学习此单元", id="re-recognize", variant="warning")
         yield Footer()
 
     def on_mount(self):
         pass
 
     def on_button_pressed(self, event):
-        pass
+        event.stop()
 
     def action_play_voice(self):
         """朗读当前内容"""
diff --git a/src/heurams/interface/screens/preparation.py b/src/heurams/interface/screens/preparation.py
index 1dfc4b8..d336ace 100644
--- a/src/heurams/interface/screens/preparation.py
+++ b/src/heurams/interface/screens/preparation.py
@@ -35,9 +35,9 @@ class PreparationScreen(Screen):
         yield Header(show_clock=True)
         with Container(id="vice_container"):
             yield Label(f"准备就绪: [b]{self.nucleon_file.stem}[/b]\n")
-            yield Label(f"内容源文件对象: ./nucleon/[b]{self.nucleon_file.name}[/b].toml")
-            yield Label(f"元数据文件对象: ./electron/[b]{self.electron_file.name}[/b].toml")
-            yield Label(f"\n单元数量:{len(self.nucleons_with_orbital)}\n")
+            yield Label(f"内容源文件对象: ./nucleon/[b]{self.nucleon_file.name}[/b]")
+            yield Label(f"元数据文件对象: ./electron/[b]{self.electron_file.name}[/b]")
+            yield Label(f"\n单元数量: {len(self.nucleons_with_orbital)}\n")
 
             yield Button(
                     "开始记忆",
@@ -75,7 +75,8 @@ class PreparationScreen(Screen):
     def action_quit_app(self):
         self.app.exit()
 
-    def on_button_pressed(self, event) -> None:
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        event.stop()
         if event.button.id == "start_memorizing_button":
             atoms = list()
             for nucleon, orbital in self.nucleons_with_orbital:
@@ -97,4 +98,5 @@ class PreparationScreen(Screen):
             memscreen = MemScreen(atoms)
             self.app.push_screen(memscreen)
         elif event.button.id == "precache_button":
-            self.action_precache()
\ No newline at end of file
+            self.action_precache()
+        
\ No newline at end of file
diff --git a/src/heurams/kernel/particles/__init__.py b/src/heurams/kernel/particles/__init__.py
index 8e26462..85748f2 100644
--- a/src/heurams/kernel/particles/__init__.py
+++ b/src/heurams/kernel/particles/__init__.py
@@ -1,3 +1,9 @@
+"""
+Particle 模块 - 粒子对象系统
+
+提供闪卡所需对象, 使用物理学粒子的领域驱动设计
+"""
+
 from .electron import Electron
 from .nucleon import Nucleon
 from .orbital import Orbital
diff --git a/src/heurams/kernel/reactor/phaser.py b/src/heurams/kernel/reactor/phaser.py
index 5a43ce9..9c153c9 100644
--- a/src/heurams/kernel/reactor/phaser.py
+++ b/src/heurams/kernel/reactor/phaser.py
@@ -24,6 +24,7 @@ class Phaser():
 
     def current_procession(self):
         for i in self.processions:
+            i: Procession
             if not i.state == ProcessionState.FINISHED:
                 self.state = i.phase
                 return i
diff --git a/src/heurams/kernel/reactor/procession.py b/src/heurams/kernel/reactor/procession.py
index 7b39ed5..463ab91 100644
--- a/src/heurams/kernel/reactor/procession.py
+++ b/src/heurams/kernel/reactor/procession.py
@@ -15,9 +15,9 @@ class Procession():
     def forward(self, step = 1):
         self.cursor += step
         if self.cursor == len(self.queue):
-            self.state: ProcessionState = ProcessionState.FINISHED
+            self.state = ProcessionState.FINISHED
         else:
-            self.state: ProcessionState = ProcessionState.RUNNING
+            self.state = ProcessionState.RUNNING
         try:
             self.current_atom = self.queue[self.cursor]
             return 1 # 成功