DyanmoDB getItem在异步Lambda内不提供任何响应

const AWS = require('aws-sdk');
const dynamodb = new AWS.DynamoDB();

exports.handler = async (event, context) => {
    const params = {
        TableName: 'yourTableName',
        Key: {
            'primaryKey': { S: 'yourPrimaryKeyValue' }
        }
    };
    
    try {
        const data = await dynamodb.getItem(params).promise();
        // 处理获取到的数据
        console.log(data.Item);
        
        // 返回处理结果
        return {
            statusCode: 200,
            body: JSON.stringify(data.Item)
        };
    } catch (error) {
        console.log(error);
        // 返回错误信息
        return {
            statusCode: 500,
            body: JSON.stringify(error)
        };
    }
};