Sub-Saharan Africa is expected to show 5% growth in 2011, according to the International Monetary¹ Fund's latest regional report.

国际货币基金组织的最新地区报告显示，2011年撒哈拉以南非洲经济增长有望达到5%。

Its outlook for next year is even brighter, with 6% average growth.

However, the IMF's Africa director, Antoinette Sayeh, warned of the impact of global financial volatility² on the region.

She told the BBC it could mean "lower exports, inward investment（对内投资） flows and decreasing aid levels".

Ms Sayeh also said that inflation, driven by high food and fuel prices, could become a problem.

She advised governments of the need to "tread a fine line between addressing the challenges posed by strong growth and preparing to ward³ off the potentially adverse⁴ effects（不良反应） of another global downturn".

Middle-income countries, most notably⁵ South Africa, have not had the same success, with growth of 3.5% this year.

The region has been hit by high unemployment and household debt, fragile consumer confidence and weak demand from Europe.