全文获取类型
收费全文 | 62342篇 |
免费 | 4942篇 |
国内免费 | 1707篇 |
专业分类
耳鼻咽喉 | 829篇 |
儿科学 | 1184篇 |
妇产科学 | 2216篇 |
基础医学 | 7908篇 |
口腔科学 | 1160篇 |
临床医学 | 6660篇 |
内科学 | 11503篇 |
皮肤病学 | 1179篇 |
神经病学 | 3890篇 |
特种医学 | 2591篇 |
外国民族医学 | 6篇 |
外科学 | 8453篇 |
综合类 | 4171篇 |
现状与发展 | 7篇 |
一般理论 | 11篇 |
预防医学 | 3342篇 |
眼科学 | 1395篇 |
药学 | 5252篇 |
19篇 | |
中国医学 | 1665篇 |
肿瘤学 | 5550篇 |
出版年
2023年 | 461篇 |
2022年 | 584篇 |
2021年 | 1887篇 |
2020年 | 1293篇 |
2019年 | 1613篇 |
2018年 | 1995篇 |
2017年 | 1515篇 |
2016年 | 1565篇 |
2015年 | 2327篇 |
2014年 | 2913篇 |
2013年 | 3393篇 |
2012年 | 4815篇 |
2011年 | 4693篇 |
2010年 | 2984篇 |
2009年 | 2611篇 |
2008年 | 3538篇 |
2007年 | 3539篇 |
2006年 | 3382篇 |
2005年 | 3124篇 |
2004年 | 2824篇 |
2003年 | 2706篇 |
2002年 | 2344篇 |
2001年 | 1837篇 |
2000年 | 1601篇 |
1999年 | 1321篇 |
1998年 | 506篇 |
1997年 | 403篇 |
1996年 | 385篇 |
1995年 | 374篇 |
1994年 | 345篇 |
1993年 | 240篇 |
1992年 | 708篇 |
1991年 | 582篇 |
1990年 | 530篇 |
1989年 | 484篇 |
1988年 | 421篇 |
1987年 | 422篇 |
1986年 | 355篇 |
1985年 | 295篇 |
1984年 | 229篇 |
1983年 | 191篇 |
1982年 | 113篇 |
1981年 | 121篇 |
1980年 | 98篇 |
1979年 | 205篇 |
1978年 | 160篇 |
1977年 | 101篇 |
1976年 | 110篇 |
1975年 | 101篇 |
1974年 | 99篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
81.
Kaplan Lewis Moheet Asma M. Livesay Sarah L. Provencio J. Javier Suarez Jose I. Bader Mary Kay Bailey Heatherlee Chang Cherylee W. J. 《Neurocritical care》2020,32(2):369-372
Neurocritical Care - The Neurocritical Care Society and the Society of Critical Care Medicine have worked together to create a perspective regarding the Standards of Neurologic Critical Care Units... 相似文献
82.
83.
84.
85.
86.
Hung-Yu Huang Min-Wei Lu Mei-Chi Chen Hsiu-Mei Chang Chih-Hsi Kuo Shu-Min Lin Chun-Hua Wang Fu-Tsai Chung 《Medicine》2020,99(50)
Second primary cancer is prevalent in patients with gastrointestinal (GI) cancer, for which lung cancer is the most common and associated with high lethality. Image screening for lung cancer was proved to be effective in early diagnosis and lower mortality. However, trials of screen for lung cancer generally excluded patients with a previous diagnosis of malignancy. The study aimed to investigate the outcome of second primary lung cancer and the factor that improve survival in patients with hepato-GI cancer.A total of 276 patients with secondary lung cancer were found among 3723 newly-diagnosed lung cancer patients diagnosed in Chang Gung Memorial Hospital, between 2010 and 2014. Patients’ clinical characteristics, stages and survival were recorded and analyzed. The patients were separated into 2 groups: Group I was defined as lung cancer detected in original primary cancer clinic and group II patients defined as lung cancer detected in other medical places.Sixty-nine cases with primary GI-hepatic and secondary lung cancer were diagnosed (42 (60.8%) in Group I and 27 (39.1%) in Group II). Although both groups had comparable primary cancer stages and treatment, more patients in Group I than Group II were diagnosed as early stage lung cancer (stage I-II: 40.5% vs 11.1%; P = .023). Group II had larger lung tumor sizes than Group I (4.7 vs 3.5 cm; P = .025). Group I showed better 5-year overall survival than Group II (P = .014, median survival: 27 vs 10 months). Among Group II, only 37% had received image follow up in clinic compared with 67% of Group I cases (P = .025). Patients with chest image follow up in clinics also had better 5-year overall survival (P = .043).GI-hepatic cancer was the most common primary malignancy in the lung cancer cohort. Patients had better survival outcome when secondary lung cancer was diagnosed in original primary cancer clinic. Chest image screening strategy may contribute better survival in secondary lung cancer due to detection at an earlier stage. 相似文献
87.
88.
Ying-Xiu Dai Ying-Hsuan Tai Chih-Chiang Chen Yun-Ting Chang Tzeng-Ji Chen Mu-Hong Chen 《The Journal of dermatology》2020,47(10):1126-1130
Proton pump inhibitors (PPI) are commonly used drugs. However, little is known about the association between PPI use and rosacea. This study aimed to investigate the association between PPI use and rosacea risk. Patients with prior PPI therapy, including 1067 rosacea cases and 4268 matched controls, were identified from the National Health Insurance Research Database in Taiwan. The cumulative defined daily dose (cDDD) was used to quantify the PPI use. Logistic regression was used for the analyses. After adjustment for potential confounders, PPI use with cDDD of more than 365 was significantly associated with an increased risk of rosacea (odds ratio [OR], 1.54; 95% confidence interval [CI], 1.10–2.15). Rosacea risk was significantly associated with PPI use of cDDD of more than 365 in women (OR, 1.62; 95% CI, 1.08–2.46) but not in men. Stratified by PPI indications, risk of rosacea was significantly associated with PPI use of cDDD of more than 365 for peptic ulcer (OR, 1.58; 95% CI, 1.12–2.21). In conclusion, prolonged PPI use was associated with an increased risk of rosacea, particularly in women and patients with peptic ulcers. 相似文献
89.
Myoung Eun Choi Hee Joo Yang Woo Jin Lee Chong Hyun Won Sung Eun Chang Jee Ho Choi Mi Woo Lee 《The Australasian journal of dermatology》2020,61(4):e410-e413
Extranodal natural killer/T-cell lymphoma (ENKTL) is a rare but aggressive cancer characterised by angiocentric and angiodestructive infiltration by NK-cells, or cytotoxic T-cell types. Histopathologically, ENKTL shows a multinodular or diffuse infiltration localised to vascular structures, resulting in angiodestruction and necrosis. We present a patient with an initially suspected diagnosis of benign interface dermatitis with a differential diagnosis of mycosis fungoides that was later found to be an aggressive extranodal natural killer/T-cell lymphoma of a nasal type and with a dismal prognosis. 相似文献
90.