我正在尝试使用 keras 从数据集中预测价格值。我正在关注本教程：https://keras.io/examples/structured_data/structed_data_classification_from_scratch/，但是当我进入拟合模型的部分时，我得到了巨大的负损失和非常小的精度
Epoch 1/50
1607/1607 [==============================] - ETA: 0s - loss: -117944.7500 - accuracy: 3.8897e-05
2022-05-22 11:14:28.922065: I tensorflow/core/grappler/optimizers/custom_graph_optimizer_registry.cc:113] Plugin optimizer for device_type GPU is enabled.
1607/1607 [==============================] - 15s 10ms/step - loss: -117944.7500 - accuracy: 3.8897e-05 - val_loss: -123246.0547 - val_accuracy: 7.7791e-05
Epoch 2/50
1607/1607 [==============================] - 15s 9ms/step - loss: -117944.7734 - accuracy: 3.8897e-05 - val_loss: -123246.0547 - val_accuracy: 7.7791e-05
Epoch 3/50
1607/1607 [==============================] - 15s 10ms/step - loss: -117939.4844 - accuracy: 3.8897e-05 - val_loss: …