全文获取类型
收费全文 | 14214篇 |
免费 | 975篇 |
国内免费 | 231篇 |
专业分类
耳鼻咽喉 | 306篇 |
儿科学 | 160篇 |
妇产科学 | 173篇 |
基础医学 | 2352篇 |
口腔科学 | 209篇 |
临床医学 | 1053篇 |
内科学 | 2832篇 |
皮肤病学 | 673篇 |
神经病学 | 1150篇 |
特种医学 | 995篇 |
外科学 | 1871篇 |
综合类 | 49篇 |
一般理论 | 2篇 |
预防医学 | 473篇 |
眼科学 | 396篇 |
药学 | 1166篇 |
中国医学 | 188篇 |
肿瘤学 | 1372篇 |
出版年
2024年 | 11篇 |
2023年 | 126篇 |
2022年 | 392篇 |
2021年 | 554篇 |
2020年 | 328篇 |
2019年 | 450篇 |
2018年 | 496篇 |
2017年 | 408篇 |
2016年 | 623篇 |
2015年 | 869篇 |
2014年 | 984篇 |
2013年 | 1066篇 |
2012年 | 1497篇 |
2011年 | 1359篇 |
2010年 | 906篇 |
2009年 | 708篇 |
2008年 | 794篇 |
2007年 | 780篇 |
2006年 | 685篇 |
2005年 | 628篇 |
2004年 | 449篇 |
2003年 | 380篇 |
2002年 | 352篇 |
2001年 | 96篇 |
2000年 | 62篇 |
1999年 | 59篇 |
1998年 | 49篇 |
1997年 | 39篇 |
1996年 | 23篇 |
1995年 | 26篇 |
1994年 | 14篇 |
1993年 | 13篇 |
1992年 | 20篇 |
1991年 | 19篇 |
1990年 | 16篇 |
1989年 | 13篇 |
1988年 | 12篇 |
1987年 | 15篇 |
1986年 | 8篇 |
1985年 | 6篇 |
1984年 | 13篇 |
1983年 | 7篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 7篇 |
1973年 | 5篇 |
1968年 | 3篇 |
1967年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
11.
12.
Kyung Won Lee Mi Sook Cho Dayeon Shin 《International journal of food sciences and nutrition》2016,67(2):184-194
Urinary iodine concentrations (UICs) in the US have been reported to be stable since 1988–1994, although those in selected subgroups remained low. We aimed to investigate iodine status among adults (≥20 years) by two different criteria of assessing iodine deficiency in population. Utilizing National Health and Nutrition Examination Surveys 2001–2012, we conducted linear logistic regressions adjusting for covariates. The prevalence of <50?μg/L UIC was higher in women than in men; increased from 11.6% (2001–2004) to 13.2% (2009–2012) at the national level and in young adults, non-Hispanic blacks (NHBs) and non-users of iodine-containing supplements (all, p?<0.05); the adjusted odds ratios (95%CI) in young adults (1.54 [1.11–2.15], p =?0.0007) and NHBs (1.70 [1.15–2.52], p =?0.0078). Median UICs confirm women and NHBs being in borderline iodine status. Recognizing the critical consequence of iodine deficiency particularly in women and NHBs, regular monitoring of iodine status is important for public health in the US. 相似文献
13.
14.
Three‐Dimensional Echocardiographic Evaluation of Mitral Apparatus during Preload Manipulation in Patients with Hypertrophic Cardiomyopathy
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hyemoon Chung M.D. Ji Hyun Yoon M.D. Young Won Yoon M.D. Ph.D. Ji Young Chung B.N. Jung‐Joon Cha M.D. Jong‐Youn Kim M.D. Ph.D. Pil‐Ki Min M.D. Ph.D. Byoung‐Kwon Lee M.D. Ph.D. Bum‐Kee Hong M.D. Ph.D. Se‐Joong Rim M.D. Ph.D. Hyuck Moon Kwon M.D. Eui‐Young Choi M.D. Ph.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(8):1261-1269
15.
16.
Paclitaxel with Cisplatin as Salvage Treatment for Patients with Previously Treated Advanced Transitional Cell Carcinoma of the Urothelial Tract
下载免费PDF全文
![点击此处可从《Neoplasia (New York, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
17.
Hoon-Chul Kang Ji Won Kwon Young Mock Lee Heung Dong Kim Hong Jin Lee Si Houn Hahn 《Child's nervous system》2007,23(11):1301-1307
OBJECTIVES: This study sought to characterize epileptic phenotypes in children with nonspecific mitochondrial disease (MD) and to evaluate MD diagnostic approaches. METHODS: A retrospective analysis of the medical, electroencephalogram, and laboratory records of 142 patients with epilepsy was performed. The patients were evaluated for MD, and 124 patients were included in the final cohort. The MD criteria used included an oral glucose lactate stimulation test (OGLST) and urine organic acid/plasma amino acid (UOA/PAA) assays as metabolic indicators of modified Walker criteria, as suggested by Bernier et al. (Neurology 59:1406-1411, 2002). RESULTS: Twenty-two patients were classified as having definite MD (9), probable MD (5), possible MD (6), or pyruvate dehydrogenase (PDH) deficiency (3), including one patient which showed a respiratory chain (RC) defect and PDH deficiency. Seven out of eight patients in whom significant RC defects were observed showed complex I defects. In 14 patients, epileptic seizures start at infantile ages. Of 17 patients who substantially presented generalized seizures, 4 patients started with partial seizures. Five patients consistently presented only partial seizures. The OGLST and UOA/PAA assays were useful for a more precise diagnosis of MD, although low positive predictive value of the OGLST was regrettable. No patient was classified as definite MD by Walker's original criteria, but the use of our revised MD criteria resulted in the classification of nine additional patients as definite MD. CONCLUSIONS: MD manifested considerable diverse epileptic phenotypes and should be considered in the differential diagnosis of epilepsy in children with unexplained encephalomyopathy and progressive and fluctuating clinical courses. 相似文献
18.
J. K. Kang Sang Won Lee Min Woo Baik Byung Chul Son Yong Kil Hong Chul Ku Jung Keon Hee Ryu 《Child's nervous system》1998,14(7):297-301
Accurate assessment and replacement of blood loss and fluid–electrolyte deficit during craniosynostosis repair is difficult
owing to patient size and the diversity of surgical technique. Forty-three patients undergoing primary craniosynostosis repair
over a 10-year period were studied retrospectively to determine blood loss and fluid deficit and to assess blood transfusion
practices during both intraoperative and postoperative periods. Blood loss was calculated on the basis of estimated red cell
mass (ERCM) and fluid-electrolyte imbalance was investigated with blood samplings. Blood transfusion was considered appropriate
if the postoperative or posttransfusion ERCM was within 12% of the preoperative value. Estimated fluid requirement (EFR) was
used in 4 ml kg–1 h–1 except for neonates. Intraoperatively, 80% of all patients were appropriately managed with respect to blood transfusion and
EFR. Postoperatively only 20% of the patients receiving transfusions were transfused appropriately. In 23.3% of these patients
(10/43) unexpected respiratory distress developed immediately after their recovery from the anesthesia. With the measurement
of estimated blood volume and allowable blood loss, appropriate transfusion could be achieved for the successful treatment
of the primary craniosynostosis.
Received: 16 February 1998 相似文献
19.
20.